1iWARNING: Products on this page can expose you to a chemical, which is known to the State of California to cause cancer or reproductive harm. **For more information go to www.P65Warnings.ca.gov**WHAT YEAR ENGINE? HEADS(3.740 & 3.800 = top outside diameter of cylinder) These sketches of the combustion chambers will help you determine which engine you have. All compression was controlled by the cylin-der head not piston design (exc. for domed pistons in some smog engines). Pay special attention to the area around the spark plug hole. The 140 can easily be determined by the 2 carburetor mounts per head and larger valves. The turbo heads often look like other heads but they have several differences (no provision for carb. choke thermostats, right head has drain tube into valve area, both heads are tapped fine threads and approximately 1/2" deep for the head heat sender). See also head number chart. Reprinted with permission from the San Diego Corvair Club. Furnished by Jerry Becker. Before ordering head gaskets, rings, etc., you may want to double check these sizes - as engines do get switched!YearDisplacement Cubic Inches* Head Gasket BORE - APPROX.Cylinder Bore* Piston Ring Groove Widths COMPRESSION & OILPiston Numbers Cast InsideDISTANCE TOP OF WRIST PIN TO TOP OF PISTON1960 140 3 3/4 (3.740) 3.375 5/64", 3/16" 6255631 (3 3/8)1961-63 145 3 3/4 (3.740) 3.437 5/64", 3/16" 3823140 (3 7/16)1964 164 3 3/4 (3.740) 3.437 1/16", 1/8" 3819699 (3 7/16)1965-69 (exc. domed)164 3 13/16 (3.800) 3.437 1/16", 1/8" 3819699 (3 7/16)1966-69 Domed 164 3 13/16 (3.800) 3.437 1/16", 1/8" 3885113 (3 7/16)1 3/81 3/1660-63: 80, 8462-63: 15061-63: 102, 98 64: 15065-66: 18064-67: 95 64-67: 110 65-66: 140 68-69: SMOGHEAD NUMBERSWe have found that the engine codes by the oil filter are often inaccurate and do NOT take into consideration that heads may have been changed. We suggest you go by the head numbers. This should be a 7 digit number within an inch of the valve cover gasket area. This list is NOT complete! See picture bottom of next page. Year Horsepower Head Numbers1960 80 3789426, 6256711, 6256721, 62578381961 80 3786588, 3786589, 3787841, 37887381961 98 3788739, 3795960, 3796023, 37959601962-63 80-84 3813512, 3813513, 3820859, 3886251, 3840578, 3886241, 3886240, 3886250, 3817566, 3817568, 3820857, 3820859, 38862461962-63 102 3813511, 3813516, 38862471961-63 VANS 80 3817566, 3817568, 3886251, 3786588, 37865891962-63 TURBO 150 3817245, 3817286, 3817287, 3886248, 3886249, 37944121964 95 3839886, 3839887, 3856626, 3886255Year Horsepower Head Numbers1964 110 3819876, 3856631, 3856632, 38862571964 TURBO 150 3819904, 3856636, 3856638, 3886258, 3886259, 3817245, 3827435, 38566371965-67 (no smog) 95 3856743, 3883862, 38785691965-67 (no smog) 110 3856759, 3878561, 3878562, 3878566, 3883858, 38838631965-66 (no smog) 140 3856727, 3856728, 3878565, 3878570, 3883861, 3883864, 38838201965-66 TURBO 180 3856756, 3856762, 3878564, 3878568, 3883860, 3883865, 38838661966-69 (smog) 95 3880707, 38807081966-69 (smog) 140 3856728, 3885165, 3878570These numbers are found on the top of the block near the gen./alternator plate (near oil pressure sender). These are some of the common numbers. Please note that GM was not always consistent in their use of these numbers and many times heads have been changed and basically changed the type of engine. Chevy did NOT always refer to the horsepower rating of an engine so in various references in the shop manuals, etc., you may find the following: if they make no mention, the engine is the low horsepower for that year (80, 84, 95). High performance was the next option engine (98, 102, 110). Special high performance always was 140, or Turbo, (either 150 or 180). The most complete and accurate listings are in the "Junkyard Primer" and "CORSA Technical Guide". XXX = replacement caseENGINE NUMBERS: Suffix - VIN #'s1960-63 HP SuffixManual 80 Y, YC, YH60 Manual 95 YA,YB61 Manual 80 YFManual 98-102 YJ, YN, YD61-62 Manual 98-102 YQManual, FC (Van) 80 VManual, A/C 80 YLManual, A/C 98-102 YMTurbocharged YRPG 80-84 ZB, ZH, ZL, ZPG 98-102 ZE, ZF, ZK62-63 FC (Van) Manual80 VAPG, FC (Van) 80 W62-63 FC PG 80 WAPG, A/C 80-84 ZD, ZJPG, A/C 98-102 ZG1964 HP SuffixManual 95 YCManual 110 YNManual, FC (Van) 95 V64 FC Manual 95 VA64 FC Manual 110 VBManual, A/C 95 YLManual, A/C 110 YMTurbocharged YRPG 95 Z, ZHPG 110 ZF64 FC (Van) PG 95 WAPG, FC (Van) 95 W64 FC PG 110 WBPG, A/C 95 ZDPG, A/C 110 ZG1965-68 HP SuffixManual 95 RAManual 110 RDManual 140 RMManual (Corsa) 140 RB, RRManual, A/C 95 REManual, A/C 110 RF66 A/C Manual 140 RZTurbocharged RLPG 95 RGPG 110 RH, RXPG 140 RNPG, A/C 95 RJPG, A/C 110 RKPG, A/C 140 RY65 FC (Van) Manual 110 RU65 FC (Van) PG 110 RXSmog, Manual 95 RS67 Smog, Manual 95 QM1965-68 HP SuffixSmog, Manual 110 RU67 Smog, Manual 110 QSSmog, Manual 140 RY66 Smog, Manual 140 RQ66 Smog, Manual (Corsa) 140 RTSmog, PG 95 RVSmog, PG 110 RW66 Smog, PG 140 RX67 Smog, PG 95 QO67 Smog, PG 110 QP66 Smog 140 QQ, QR1969 HP SuffixSmog, Manual 95 ACSmog, Manual 110 ADSmog, Manual 140 AGSmog, PG 95 AESmog, PG 110 AFSmog, PG 140 AH