VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This requires a little more time but COMP does not charge extra, which is a great service if you are into tweaking the cam a bit to do something special. item 7 1957-1963 Corvette Camshaft GM 3736098 Solid Lifter 283 Sp Hi Perf 327/340 360hp 1957-1963 Corvette Camshaft GM 3736098 Solid Lifter 283 Sp Hi Perf 327/340 360hp. His work has appeared in the "New Haven Register," Medford's "Mail-Tribune" and the "Ashland Daily Tidings." These spec are for cam install @108 intake ctr line duration @.050 intake 236 ext 242 lobe lift .3470in .3600 ext lobe selection 112.0 where do I set my timeing for first start ? Visit www.jamsionline.com to shop today. To Develop Good Eye Habits While Driving You Should? Small Block Crankshaft Casting Numbers Lookup Type your crankshaft casting number in the SEARCH BOX below. Run-out on. From the distribute drive gear down are the folloing markings: CWC, 06, C14, EP1. They are not flat, and they are recognized with a slight crown on the face. i have a 383 chev engine ibought and would like to know what cam is in it. With over 35 years of experience in automotive machining, you will not find a more trustworthy and reliable source of parts. $799.00 +$36.00 shipping. I actually went through several lists and made some corrections before making this list. DOHC is a production to improve the volumetric of the internal combustion engine in which it has more power than a simple overhead cam. They include: The essence of knowing how to identify your camshaft makes it easy to avoid errors, unnecessary bills, and frustrations that come along with having the wrong camshaft. Hi, I have a cam that trying to figure out the specs on. I was pretty careful with the float settings etc and it fired right up when put back on! Could someone help me identify these cam numbers ? Reading a Cam Card: Advance The HI-PO color coded stripes on the camshaft end are green, orange and red. CAMSHAFT SPECIFICATIONS Part No. Can a Bad Battery Cause a Check Engine Light to Come On? with Jeff Smith: How to Decode a COMP Cams http://www.onallcylinders.com/Jeff Smith: First of all, the CC refers to COMP Cams. The first three-digit number shows the average duration time of the lobes. The 3709 lobe is listed as 265 degrees of advertised duration with 212 degrees at 0.050 and 0.328-inch lobe lift. by Greenlight Mon Nov 10, 2014 6:56 pm. In 1973, it was the cam for the 307/115hp; 350/145hp, 175hp, 190hp; and 400/150hp. At one time they supplied 85% of the blanks in the world. the 4.3L LT1 was also referred to as the L99 (not to be confused with the LS variant bearing the same name) I have a fessler roller cam trying to identify the grind specs. 52.01.07 Chevrolet LS7 Camshaft. The engine needs to function by opening the valve with the help of the camshaft. In 1970, it was the cam for the 307/200hp; 350/250hp, 300hp; and 400/265hp. If it is an aftermarket service replacement cam, it may not have the same last 3 digits of the casting number cast between the lobes. For the intake centerline method, once the cam is installed and TDC is established on the degree wheel, then roll the cam around until the dial indicator signals maximum lift. Used on RPO: L86 (1980-1991). It's a 10168588 casting that had the numbers "4.3" cast on the side, too. This is a job for professionals and the mechanically-inclined. Switching to Synthetic Oil After 100k Miles: Pros and Cons. GM used a forged crankshaft, oil-spray cooled Hypereutectic pistons, and a hydraulic roller camshaft made to handle boost. Because the camshaft orchestrates the entire valve system, your Chevy won't run properly without it. They make castings for CMC (Camshaft Machine Corp.) and EPC (Engine Power Components) and others. COMP Cams 12-600-4 Thumpr Cam, Small Block Chevy, 2000-5800 RPM. It helps you know the compatibility of the camshaft to the supposed vehicle you want to use it for. The numbers engraved in the body part of the camshaft are called the Stamped number or casting number. Then do the same process with the lobe at 0.050 on the closing side. The HR refers to this as a hydraulic roller camshaft while the 114 refers to the lobe separation angle (LSA). The end of the cam is stamped 3709/3711 HR 114 followed by CC and 7661-11. 1014789895-98350.Gen.I crate motor1015955087-953501015955187-953051015955287-953501015955387-953051017438991-94350.LT5, ZR1, DOHC, 32-valve, drvs. A roller camshaft has the valve opened faster and remains at a higher lift for a certain time; it allows more airflow and more power, which reduces wear. The GM tube has the ID number as 3863151 which correlates to a L79 Cam however the stamping at the end is 920883. I have a Street Performance comp cam that was purchased in 2007. This is the number of crankshaft degrees of separation between the intake and exhaust lobe center lines. In this case, we dont know what the opening and closing points are although you could compare the intake lobe points to an off-the-shelf XFI RPM Hi-Lift cam and probably be pretty close. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. I hope it helps you identify the Chevrolet engine parts you are working on. This number should be on your camshaft, followed by a number of degrees. Despite the differences, however, an 8.1L camshaft will drop right into a 454 like it belongs there - but it will only run four cylinders. In 1970, it was the cam for the 307/200hp; 350/250hp, 300hp; and 400/265hp. Mon to Fri: 8am - 5pm CDT; Gandrud Chevrolet 919 Auto Plaza Dr. Green Bay, WI 54302; Sales: 888.284.7491 performance@gandrud.com; Contact Us; Connect With Us (See below.) VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. $426.78. Looks to have stock cast iron heads and exhaust. The Chevy orange will appear as new for decades.Gear shifting is accomplished with a rebuilt 1960's HURST Competition Plus shifter specific to the C2 Corvette w/Borg Warner which is extremely rare.Ignition is handled by a computerized multiple spark discharge controller providing instantaneous throttle response by way of multiple sparking at . On the outside there is a Carter AFB 9637 (625CFM) sitting on an Edelbrock manifold. These markings will usually be in the center of the camshaft, obviously in between the valve lobes. That gives us our first clue where to look for the rest of the numbers. We have a hint because if a camshaft if ground with no added advance, the intake lobe centerline will be the same number as the LSA114 degrees After Top Dead Center (ATDC). Which cam are you refering to that helped your son achieve 11.80? A SOHC allows at least 2 to 3 valves per cylinder configuration, with more manufacturer prowess. Crankshaft Identification Use these casting numbers to identify the crankshaft you have. This is the COMPCams equivalent of the Rosetta stone for cam lobes. .390 .410 310 320 1.50 in 1968, it was the cam for the 307/200hp; 327/210hp, 250hp, 275hp, 300hp; and 350/295hp. How Long Does it Take Transmission Fluid to Circulate? side, aluminum1017439091-95350.LT5, ZR1, DOHC, 32-valve, pass. How Long to Drive After Reset Computer to Pass Emission Test? Car AC Compressor Not Turning On (Causes and Quick Fix). There are two types of cams that you can tell the difference without using a lens or going the extra mile to tell the difference. journal.3.00" stroke3849847.283.forged..small journal.3.00" stroke3876764.283.forged or cast..sm. Different chamber volumes, port volumes, port locations, valve sizes, etc. This advances the intake centerline by that number of degrees. The specs on that cam are: (read int lift, ehx lift, int duration, exh duration, rocker ratio). . The 7661-11 is a serial number specific to that camshaft only. There are 3 different ways to select your camshaft tightly. I did a search as well, google and on here. Camshafts are stamped by the manufacturers as a means of identification. I suspect you have . We investigated a couple of our Comp off-the-shelf LS cams and found they were ground with 5 degrees of advance, but that is no guarantee that your camshaft is ground that way. 10186060 Hydraulic Flat Tappet "454". Answer (1 of 4): Most common specs for an engine would be for example. A 'VE Table' is one of two methods used to control fuel delivery, typically the secondary method with the primary being a MAF (Mass Airflow Sensor). Now turn the engine clockwise and stop at 0.050 on the opening side of max lift and record the degree wheel reading. A stamp is not a functioning part of a camshaft. Small Block Casting numbers Use these casting numbers to identify the exhaust manifolds you have. If we didnt already know this was an LS cam, the first thing we would want to do is determine the engine family. Show More Show Less. They are the flat tappet and roller camshaft. JAMSI is a trusted source of automotive engine parts. Can I Sell a Car if the Title is not in my Name? If I rotate the camshaft the other side has markings of AO, D14. Only thing is the idle mixture screws have little effect (oh no timing pointer either on order) so cant really tell timing. For instance, the number for a Toyota 3SGE would be CS 3SGE. The 8th digit of the VIN. I have a cam trying to set startup timeing hr112 intake hyd .555 ext .576 duration .006 valve tapping lift 287 in 293 ex valve timing .050 open int 10 close btdc46 abdc exh :57 BBdc 5 ATC. The recall affects several models of heavy duty Chevrolet Silverados and GMC Sierras with optional engine block heaters. Chevy . A roller camshaft has its wheel attached to the bottom of the lifters body. Personally, I would trash the cam and go buy a new cam and lifter set that you know what the grind is. 366298.4Bowtie, Aluminum, billet main caps, 3.398" bore with sleeves, two piece rear main seal. Thank you, if you can help, send me an e mail and I will send you a picture. 0967 is the last four digits of the GM part number. It was later decided to build a supercharged version of the LS3 and it has less compression at 9:1:1 to run safer under boost. One thing I"m trying to figure out is if the orig cam is still in the car. Under that heading toward the bottom we found a tab for the Cam Lobe Master Catalog. If the number was 110 degrees, this would increase the amount of overlap. Drivetrain: '95 T56, pro 5.0 shifter, hayes clutch, Stock 10 bolt with 3.42's We found it under the heading of Xtreme RPM for LS1 lobes, Hi Lift. Stock GM LS engine cams feature LSA anywhere from 116 to 121 degrees because GM is concerned with creating a very smooth idle. The greater number of degrees means there is less overlap between the intake and exhaust lobes. The only stamped markings on the front are 951758. It's real easy to spot if the heads are off because of the small 3.74" bore. Sept. 2019 Drag-Week Winner - N.Y. Legal Streeter - 1956 Chevy Bel-Air, http://www.msnusers.com/Chrisjunque/shoebox.msnw?action=ShowPhoto&PhotoID=2. 139536 93B2B, I have a solid roller cam has cc 950 k5462 r6 292-5 296-6 stamped on front help with specs, I am just trying to decode the cam out of my 400m. journal.3.00" stroke3876768.283.forged..small journal.3.00" stroke3884577.327.forged..small journal.3.25" stroke3892690.350.forged..medium journal3.48" stroke3911001.307,327cast.medium journal3.25" stroke3911011.307,327cast.medium journal3.25" stroke3914672.327.forged..medium journal3.25" stroke3923279.302.forged..medium journal3.00" stroke3932442..267,305,350..castmedium journal3.48" stroke3941174.307,327cast.medium journal3.25" stroke3941178.302.forged..medium journal3.00" stroke3941182.350.forged..medium journal3.48" stroke3941188.350.forged..medium journal3.48" stroke3949847.283..forged or cast..sm. CWC is the foundry that cast the cam blank. For online resources, check out NastyZ28.com, Kendrick-Auto.com or Chevy-Camaro.com which have detailed listings, or contact a Chevrolet parts department to identify the camshaft. ZL-1, 2nd version, Mark IV3955270.427.692 or 4 bolt3955272.396.692 or 4 bolt3955274.366T68-854-bolt3955276.427T68-734-bolt3963512.427.692 or 4 bolt3963512.454.70-762 or 4 bolt3969852.366T68-844-bolt3969854.396.692 or 4 bolt3969854.402.70-722 or 4 bolt3969858.427T68-844-bolt3999289.454.71-792 or 4 bolt, some "CE" replacement blocks had four bolt main caps3999290.396.68-692 or 4 bolt, Truck3999290.402.70-722 or 4 bolt, Truck3999290.402.722 or 4 bolt, Passenger3999293.366T68-904-bolt3999294.427T68-844-bolt100511074544-bolt, Bowtie, MkIV, 9.8" deck, siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"10069282366T90-914-bolt, Mark IV, Tall deck10069284427T..4-bolt, Mark IV, Tall deck10069286454.90-914-bolt, Mark IV, Short deck10114182454.91-up4-bolt, Gen.V10114183366T91-up4-bolt, Gen.V10114184427T91-up4-bolt, Gen.V10134366454T..4-bolt, Bowtie, Gen.V, Tall deck101850504544-bolt, Bowtie, Gen.V, Short deck10237297454.96-up4-bolt, Vortec 7400", "L-29" Gen.VI10237299427T96-up4-bolt, Gen.VI, 7.0L, truck10237300502.96-up4-bolt, Gen.VI, 4.466" bore12550312427T96-up4-bolt, Gen.VI, 4.250" bore, fuel pump boss, clutch linkage pivot boss12550313454.91-up4-bolt, Gen.V crate motor, Gen. VI 4.25" bare block, fuel pump boss12556110496.01-up4-bolt, Gen.VII 8.1L, "Vortec 8100", Truck12561357454.96-up4-bolt, Gen.VI125613585024-bolt, Gen. VI14015443454.87-902 or 4-bolt, Mark IV, Truck, Motorhome14015445454.78-902 or 4 bolt14044807454T..4-bolt, Bowtie, MkIV, CNC prep, Tall deck, 4.25" bore or 4.495" bores, 191659554541996-2001 L29140968595024-bolt, Gen.V, HO245025044544-bolt, Bowtie, Gen.V, Race prep, 9.8 "short" deck height24502506454T..4-bolt, Bowtie, Gen.V, Race prep, 10.2 "tall" deck height245025724-bolt, 4.5" bore Olds DRCE 2, 9.5" deck height255344024-bolt, 4.590" bore Olds DRCE 3, 9.25" deck height. BBC Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust IP = Intake runner volume OVAL PORT - Valve size 2.06 intake, 1.72 exhaust BBC Camshaft Part Numbers Note 1: 80 deg overlap, 396 375hp L-78/L-89, 427 425/435hp L-71/L-72, 454 450hp LS-6, HP streetof engines we now know as Small Block Chevys. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Drake studied journalism at Southern Connecticut State University. The Fora platform includes forum software by XenForo. p/n 12560967, .466/.457, 191/190, 114 LSA. The Chevy part number for that cam is 3896929. That particular cam put my son's pump-gas 406" SB Chevelle to an 11.80 E.T. By visual inspection. were used. Its got a great loping idle (big cam?? Jeff Smith: First of all, the CC refers to COMP Cams. 1130.327.forged..mediumjournal3.25" stroke1178.302.forged..medium journal3.00" stroke1181.305,350cast.medium journal3.48" stroke1182.350.forged..medium journal3.48" stroke2680.327.forged..small journal.3.25" stroke2690.350.forged..medium journal3.48" stroke3279.302.forged..medium journal3.00" stroke3474.283.forged..small journal.3.00" stroke, military tank use4577.327.forged..small journal.3.25" stroke4672.327.forged..medium journal3.25" stroke310514..350.cast.medium journal3.48" stroke330550..350.cast.medium journal3.48" stroke354431..262.cast.medium journal3.10" stroke3727449.283.forged..small journal.3.00" stroke3729449.265.forged..small journal.3.00" stroke3734627.327.forged..small journal.3.25" stroke3735236.265,283forged..small journal.3.00" stroke3735263.283.forged..small journal.3.00" stroke3782680.327.forged..small journal.3.25" stroke3814671.327.forged..small journal.3.25" stroke3815822..265,283,302.forged..small journal.3.00" stroke3835236.283.forged..small journal.3.00" stroke3836266.283.forged..small journal.3.00" stroke3848847.283.forged or cast..sm. Vortec truck, Gen.I crate motors and ZZ4, roller cam, one piece rear seal: 12550592 : 97-up : 350 : crossbolted block, Gen.III, LS1, aluminum: When you purchase through links on our site, we may earn an affiliate commission, which supports our community. How to Start a Car with a Blown Head Gasket (Explained). 285/300hp, 64cc chambers, 1.94"/1.5" valves1401441580-85267/3051401441680-86305.1.84"/1.5" valves, 58cc chambers1401444080305.1.84"/1.5" valves1401982180-863501401992479-812671401992680-863501401051680-86350140205178035014020555813051402055681350140220568535014022206803501402230180-863051402260180-86267/3051.72"/1.5" or 1.84"/1.5" valves, 53cc chambers1402280180-8630514024816..350.76cc chambers, 1.94/1.5 valves, Gen.I crate motors1403480678-822671403480778-863051403480880-863501403480896-up350.76cc chambers, 1.94"/1.5" valves, Gen.I Goodwrench crate motors1403481080-86350.Truck1403481180-86350.Truck1403912181-86305.Truck1403912281-86305.Truck1407111480-863501407538180-86350.Truck14079261863501408584480-86350.Truck140859638635014088526..350.Gen.II, LT1, aluminum1408911986-883501409409386-883501409621780-96350.Crate motor, 285hp/300hp, 64cc chambers, 72' or 90' center intake manifold bolt angles1410108187-953051410108387-up350.Gen.I, also used on crate motors, 285 or 300 hp, 64cc chambers, 72' center manifold bolt angles1410112886-87350.Aluminum, 58cc, angle plug1410218787-91305.1.84"/1.5" valves1410219187-up3501410219387-up350.1.94"/1.5" valves22542525Dart/Olds/Chevy aluminum, 14'or 17' race head.2450255996-97.Bowtie, "SB2", 1st version, "mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber25500141Buick/Chevy aluminum, 10' race head, 42cc chambers, symmetrical ports, 235cc intake port volumes, 2.1"/1.625" valves25534351C..04-up.Gen.I Bowtie, cast iron Vortec head, 175/65cc ports, 2.00/1.55 valves, "small port head"25534371C..04-up.Gen.I Bowtie, cast iron Vortec head, 206/77cc ports, 2.00/1.55 valves, "large port head"3341736990-up350.Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc, 0-3267114-bolt, Alum., CanAm, 4.44" bores, steel cylinder liners340220..427T68-854-bolt345014..454.70-86346236..454.75-762-bolt359070..454.70-90361959..454.73-902 or 4 bolt364776..427T68-854-bolt364779..366T68-904-bolt399204..509.70-714-bolt, Alum., CanAm, 4.5" bores, steel Cylinder liners399293..366T77-784-bolt473478..427T77-904-bolt495102..4-bolt, Alum., CanAm, 4.5" bores3782870.427T68-764-bolt3824553.366T66-674-bolt3855961.396.65-662 or 4 bolt3855961.427.662-bolt3855962.396.65-664-bolt3855977.366T66-734-bolt3869942.427.66-672 or 4 bolt3902406.396.672 or 4 bolt3904351.427.672 or 4 bolt3904354.366T66-764-bolt3916319.366T684-bolt3916321.427.682 or 4 bolt3916323.396.682 or 4 bolt3925521.427T68-854-bolt3935439.427.68-692 or 4 bolt3935440.396.68-692 or 4 bolt3937724.366T68-854-bolt3937726.427T68-844-bolt3946052.427.694-bolt, Alum. Does OnStar Keep Location History? Check this castingcarefully to determine which features it may have. I purchased a used hydraulic roller camshaft from a friend that was originally used in an LS1 engine. In 1967, it was the cam for the 283/195hp; 327/210hp, 275hp, 300hp; and 350/295hp. They are widely used and they perform well, which is more affordable than a roller cam. (396 BBC), Is this enough information to get the specs on this cam? It doesn't indicate a different cam or an earlier or later version. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. Why are Volkswagen Oil Changes so Expensive? 4485B 4391B HR112+4 R (with a line under the R ) then CC and at the bottom G1979-14. Compare Related Articles. Installing a Timing Belt on Ford Ranger chevrolet image by Eduard Shelesnjak from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. I can't help you in regards to who actually did the final grinding. The radiator, hoses, timing assembly, belts and fan will need to be removed to access the camshaft. The model prefix is the first part of the camshaft number, and it describes the vehicle that the camshaft is meant for. That gives us our first clue where to look for the rest of the numbers. Crane makes Blueprint camshafts for almost, if not, every GM, Ford, Mopar engine from the sixties and seventies. What are your thoughts on the #5054 or anything else? The GM Generation I and Generation II (LT) engine families are both derived from the longstanding Chevrolet small block V8.The Generation III small-block V8 was a "clean sheet" design, which replaced the Gen I and Gen II engine families in 2002 and 1995 respectively.. Like the previous two generations, the Buick and Oldsmobile small blocks, the Gen III/IV can be found in many different brands. The second lobe number 3711 refers to the same family of lobesthis one specd at 269 degrees advertised with 216 degrees at 0.050-inch tappet lift with a lobe lift of 0.330 and a theoretical valve lift of 0.561-inch. You need the best camshaft that works well with your vehicle. We would like to thank everyone that has contributed to the data provided on this site. In 1975, it was the cam for the 350/145hp, 155hp, 165hp; and 400/175hp. 14088552 Leave a comment at the end of this post if you cannot find the information you want. However, most cams intended for street use are ground with several degrees of advance. Can You Register a Car with a Bill of Sale and No Title? Can a Wheel Speed Sensor Cause Limp Mode? Less overlap generally produces a more stable idle while more overlap makes the idle lumpier. CAM 6930 1967 CAMSHAFT ID. These numbers only describe the functions or tell the specifics of each product. Contact. Chevy V8 "W" Motor 348-409 Casting Numbers. exhaust valves. Stamped on end is Z099, also has three pink dots above that stamping. I have Comp Cams camshaft. Learn how your comment data is processed. The Chevy Big Block's Camshafts can be identified by a number that is cast or stamped and is usually located in between the CAM lobes. The cam is in very good used condition and will likely be reused. Chevy V8 BBC Block and Head Casting Numbers. i have a hr8ty 3050s/305is y7379 cc 212203 2811 out of a 1999 360 dodge magnum i cannot get any info on lift duration or center line also has cc letters asume comp cam ? On other cams Ive looked at, they just list the part number which is easy to look up, but this cam has a bunch of numbers I dont recognize. COMP offers this as a service to anyone who is looking for a custom combination of specs that are not listed as an on-the-shelf cam. The Vehicle's Service Parts Identification Label Will Have The VIN Digit and Engine RPO Code (Circled) To Confirm Engine Application Gen III LS Engine Car Applications 1997 to 2004 Corvette, 1998 to 2002 Camaro & Firebird, 2004 GTO: 5.7L LS1 2001-2004 Corvette, 2004-2005 Cadillac CTS-V: 5.7L LS6 Gen III LS Engine Truck Applications: To avoid spinning, roller lifters are lifted together. (Yes or No). I have no idea whats on the inside. 1991 and later Gen.V, VI and VII production BBC motors have one-piece rear main crank seals. Your email address will not be published. cam 5054 i am still searching for "Three Rules of Work: Out of clutter find simplicity; From discord find harmony; In the middle of . Inc. Lee's Summit MO. To be sincere, flat tappet just owns the name flat. Privacy Policy. It is typically located in the center of the cam between the lobes. In 1969, it was the cam for the 307/200hp; 327/210hp, 235hp; and 350/250hp, 255hp, 300hp. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. The identification number consists of a seven-to-eight digit code. Any time you are making this kind of important decision about your engine, it's . ). All you have to do to determine valve lift is multiply the lobe lift times the rocker ratio. The best way to identify an unknown camshaft is by identifying it with your eye or using stamped numbers engraved on the camshaft to identify it. Chevy Intake Manifolds How Long Does it Take for Oil to Drain Back into the Pan? 330864..68-84ovalOPEN396, 402, 366T, 427T, 454 Truck330865..68-84ovalOPEN396, 402, 366T, 427T, 454 Truck330866..68-78ovalOPEN366T, 427T330867..68-73ovalOPEN427T336765..68-78ovalOPEN427T336768..73-76ovalOPEN427T336781..73-85ovalOPEN454, 118cc chamber, 256/114cc ports343771..68-86ovalOPEN366T, 427T, 454343772..68-86ovalOPEN366T, 427T, 454343783..70-76ovalOPEN454 Truck346236..75-87ovalOPEN454, 120cc chamber, 225/116cc ports352625..70-76ovalOPEN454 Truck353049..73-84ovalOPEN454, 122cc chamber, 255/119cc ports366765..74-78ovalOPEN427T473328..68-69ovalOPEN366T3856206.65-66oval..CLOSED..396, 97cc chamber3856208.65rect..CLOSED..396/425hp, 109cc chamber 396/375hp "Z-16" Chevelle3856213.66-82oval..CLOSED..366T, 427T3856260.68oval..CLOSED..396 Truck3872702.65-66oval..CLOSED..396, 427, 98cc chamber3873858.65-67rect..CLOSED..396, 427, 109cc chamber3876875.77-85ovalOPEN427T3904390.67oval..CLOSED..396, 427, 98cc chamber3904391.67rect..CLOSED..396, 427, 107cc chamber3904392.67rect..CLOSED..427, Aluminum, L88, L89, 107cc chamber3904393.68-76ovalOPEN366T3908952.67ovalOPEN427, "M.Truck", Marine3909802.67oval..CLOSED..396, 427, 101cc chamber3917215.67-68oval..CLOSED..396, 427, 101cc chamber3917219.68-85ovalOPEN366T, 427T3919840.67-69rect..CLOSED..396, 427,107cc chamber3919842.68-69rect..CLOSED..396, 427, Aluminum L88, L89, 107cc chamber3931063.68-69oval..CLOSED..396, 402, 427, 101cc chamber3933148.69-84ovalOPEN'69 396/265hp, 366T, 427T, 112cc chamber3933149.68-76ovalOPEN427T, 122cc chamber3935401.68-76ovalOPEN427T3946074.69&71rectOPEN'69 427 L88, ZL1, Aluminum, 118cc chamber '71 454 LS6, "round exhaust port"3964290.69-70oval..CLOSED..396, 402, 427, 454, 101cc chamber Large or small hex spark plugs used3964291.69-72rect..CLOSED..396, 402, 427, 454, 109cc chamber, Large or small hex spark plugs used, crate motor usage in years after 1970.3965198.68-69oval..CLOSED..396 Truck3975950.68-70ovalOPEN396, 402 Truck, 366T, 427T3986133.68-85ovalOPEN366T, 427T, 454 Truck3986135.69-73ovalOPEN366T, 427T3986136.68-84ovalOPEN366T, 427T, 454 Truck3993820.71ovalOPEN402, 113cc chamber, 255/114 ports3993820.71-84ovalOPEN454 Passenger and Trucks, 113cc chamber, 255/114 ports3994026.71rectOPEN454 LS6, 118cc chamber3999241.72ovalOPEN402, 454, 113cc chamber, 6272292.70-78ovalOPEN402, 4546272990.70-uprectOPEN454 service replacement, used on some MKIV crate engines, 118cc chamber10045427..rect.Pontiac/Chevy Aluminum, 91cc chamber Large Port, race10049875..rect.Pontiac/Chevy Aluminum Small port, race10051128..rect.Bowtie, Aluminum 72cc chambers Symmetrical ports10051129..rect.Bowtie, Aluminum "raw" casting, Symmetrical ports10052902..ovalOPENMkIV, 427T1010114091-upoval..CLOSED..Gen.V 366T, 427T1011415691-upovalOPENGen.V & VI 454, 118cc chamber1014127996-upoval..CLOSED.."Vortec 7400", 100cc chambers1048705277-90ovalOPEN366T1236339196-upovalOPENBowtie, Aluminum, Signature Series, fits MKIV, Gen.V, Gen.VI, 110cc chamber1236340196-uprectOPENBowtie, Aluminum, Signature Series, fits MKIV, Gen.V, Gen.VI, 118cc chamber1255816201-upoval..CLOSED..Gen.VII,"Vortec 8100", 8.1L, 496, truck1256024198-upoval..CLOSED.."Vortec 7400", 100cc chambers1256293291-95ovalOPENGen.V, truck crate motor, 118cc chambers1256293391-95ovalOPENGen.V, 118cc chambers1256293400-uprectOPENGen.VI 502 Marine1401107769-uprectOPENAluminum, fits MKIV, "C-port" 118cc chamber, also sold as a "solid" head1404486184-96rect.Bowtie, Aluminum, MkIV, "raised runners", 1st design, 105cc chamber1404486196-uprect.Bowtie, Aluminum, Signature Series, fits MKIV, Gen.V, Gen.VI "raised runners", 2nd design, 115cc chamber1404486184-96rect.Bowtie, Aluminum, MkIV "raw" casting of "861" MKIV 1st design1408104578-87ovalOPEN4541408105285-87ovalOPEN366T, 427T, 454 Truck, Marked "HiPerf"1409235986-90ovalOPEN366T, 427T, Marked "HiPerf"1409236086-90ovalOPEN454 Truck, "peanut" round ports1409618870-71rectOPEN454 service replacement, also used on later Mark IV LS-6, LS-7 and 454 HO crate motors, 116cc chamber1409708891-uprectOPENGen.V 454/502 HO, 118cc chamber2450258597rect.Olds/Chevy, DRCE 2, Pro Stock aluminum, for blocks w/4.900" bore spacing2553440404rect.Olds/Chevy, DRCE 3, Pro Stock, aluminum, for blocks with 4.900" bore spacing, Oval includes both "peanut" (also called "round") ports and large oval ports, Copyright EngineRepairShop.com 2011-2023 Privacy Policy Disclaimer.
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