Years. 842        318/112cc port 1.94-1.5 valve, 19 lbs. 3932441X    400, 80cc, 1.94-1.6 valves, 161/65cc intake port 3774692    283, 58-64 Pass, Power Pack 3789817    327, 62-67 10045434    Pontiac Alm.     Oval Port CASTING # YEAR: CID: MAINS: NOTE: 10125327: 92-97: 350: 2 OR 4: LT1/LT4, Corvette blocks normally 4-bolt main: 10168588: 94-96: 265: 2: L99 4.3L, B-Body covers      Truck 3767462    327, 62-67, 161/65cc ports 3928495    327, 68           Oval Port 3774684    327, Pass, Truck, 62-64 3964290    400-454        70 3927185    307, 327, 69cc, 69-70      Truck Comments. 3849852    283, 57-67 complete 3774682    283, 327, 60-64 3747460    283, 327, 59-67   LW casting if the casting number off of your heads are not 140 or 772, then these are not the correct heads for your application. 3870064    265, 283, 56-62 1971-76: 333881: 350: 1.72: 1.5001-. 3994026    454 3986136    366-427        68-84 3973487    350, LT1, 75cc, 161-165cc intake port           360HP 3795896    283 Power Pack,63-65                 59-61 7700    Vr. 3767465    283, 59-61 3912313    327, 65-67 170cc intake port 3927186    302-350, camel hump, 63cc chambers, 161/65cc ports 340        320/120cc port L-88, ZL-1, LS-6 3964291    402-454        70 bolt holes 3852174    327, 62-64 14101083    350 285HP, or 300HP, Crate Motor, 1.94-1.5,  72º intake 4350            76cc, 162cc intake 3725306    265, 56-57 ex.            Sq.                 68-76 3931635    250, 68-76 Valves. 76cc, 1.94-1.5, flange VC holes, heavy castings 1st design Number 3927186 is found in the 1969 and 1970 models with the 302 and 350.           Corvette 425 HP Sq.     Truck   Oval Port, 3795896    327, 250HP Corvette, 62-64, 140/60cc ports. port,                66-68 3909802    396-427        67 3912311    327, 67 The LSA heads also used a stronger rotocast A356-T6 alloy. 10185040    Symmetrical port, splayed valve, alm, 45cc, 263cc intake port, 6085    Performer    87-93, center bolt valve cover, 60cc Side 6X and 4X Head Information. Port  Alm  L-88 3998991    307, 350, 75cc, 72-73, 73 had hard seats It is interesting, I never knew they made a steel casting, looks like they were on 99-00 LQ4 motors. 3917293    307, 327, 75cc, 144/58cc ports 3817682    283, 61-62 14014416    305 HO, 80-85, 58cc, 1.84-1.5, 165/59cc ports, 7 bolt ex. 3748772    283, 58-61       Truck    Oval Port 6087    Performer     87, center bolt valve cover, 3876775    283, 327 210 HP Camaro, acc. 3782870    327, 62-37 Many folks want to know where to look for these Chevy engine casting numbers and codes on blocks and cylinder heads so we decided to put these pages with photos together to help you find them. 333882        350-400, 74-80, 76cc, 160/60cc ports 3856206    396 77' L82 Head Casting Number (Read 860 times) Dec 24 th, 2004 at 7:28am: captainmorgan Offline Senior Member Minnesota Shark Minnesota. 3758379    348            Oval Port Find cast numbers. 3789935    283, 57-62 Small Blocks 3998916    350 LT1, 76cc, screw in studs, big valves? 462 is the most-used SBC head casting number out there- at least six different SBC cylinder head casting numbers end in 462, according to 'the books': 3767462 3782462 3814462 3890462 3891462 3990462 Fuelie casting identifiers you can call a dealer or a engine rebuilding shop and give them the numbers.            Oval Port Big Blocks, 058        241/86 cc port 4351            67cc, 162cc intake 3755550    283 Corvette, 59, stagger VC bolts 10088113    350, 88-up, Corvette, Alm., angle plug, 58cc, .100 raised 3783949 53-54 235.                 67 you never have to worry we can always identify our product. 3917291    302, 327, 350, camel hump, 161/65cc ports 31400002    same 01, except with 72º intake bolts for 87-up 3731262    265, 56, 2x4 carb, Corvette 14014415    267, 305, 80-85 3917292    327-350 Corvette, camel hump, 68 3755537    283, 57-62 343771      366-454                85-88 10033867    Pontiac Alm. Chevy V8 Casting Number Locations (Part 1) We get a number of inquiries regarding casting numbers, engine build dates and engine assembly/suffix codes. 3837739    283, 57 3743096    327, 62-67 GMC truck And many Corvette buyers in 1979 were impressed with the performance – 14,516 L-82 Corvettes were produced for 1979 – the highest number of any year the L-82 was a Corvette option. 4257            76cc, 172cc intake The L48 was the first version of the base 350 V-8.                 60-61 3928455    302, 327, 68 port 333882 350-400, 74-80, 76cc, 160/60cc ports.         68-85     Truck HD 3975950    366-427        68-70 990        323/127cc port 14102187    305HO, 87-91, 1.85-1.5, 58cc, 7 bolt ex. Port 14011083    350, 87-up, 64cc,  center bolt VC, 72º manifold bolt 10134363    Bowtie, Hi port, alm., 18º, angle plug, 50cc, 250cc intake center bolt VC Jr. Race Heads, Bare, 71cc, 212-267cc port, CNC Machined, 3904392    427 Heads side, 94-95 33417369    350, Gen.I,  Crate motor, Hecho En Mexico, 7 bolt ex,         76-84     Truck HD Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports, Gen II L99 4.3 Liter V-8, cast iron, reverse flow, GM Fast burn 62 CC 210 CC intake runner angle plug Vortec, Gen III LS1 "GTZ" aluminum 38cc angle plug. 3701481 54 235. 10051182 Small Block V8 2 bolt, Bow Tie block, 3.75-4.30 bore, 1-piece rear seal. 840        326/120cc port     3932441X    350, 80cc, 1.94-1.5 valves, 161/65cc port 14092359    427 Cylinder Head ID. 6071    Performer RPM    Same as 6061 exc.       Truck  Oval Port port We have a good supply of used ‘186 & ‘492 heads available with everything from … Continue reading → What are the spec's for this head? port, torquer, Trick Flow Twisted Wedge Alm ( by part number ) 3973493    400, 71, 76cc 1.94/1.50. 3748770    283, 1x4 , 2x4 carbs, FI Vette, X58, stagger VC bolts 3743056    283, 58 3919842    396-427        68-69 3852583    409 3946813    350, 69-70, 138/72cc ports 462624        350-400, 75-86, 161/62cc ports, 7 bolt 60cc, 165cc intake port 3970126    327, 350, 67-70 3854520    283, 327, 62-67, 140/60cc ports 82-86.      Oval Port The L48 and L30 share the same heads, block, intake and exhaust manifolds, carburetor and camshaft.

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