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Chevrolet V8 Engine ID Codes

1965

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Model Model No. CID H.P. (RPO Code) Trans/Options Suffix
Passenger 154/156/164/16600 283 195 Manual GA
        Manual, R.H.D. GB
        Manual, low compression GD
        Manual, low compression, R.H.D. GE
        Powerglide GF
        H.P., low compression GG
        H.P., R.H.D. GH
        H.P., low compression, R.H.D. GI
      220 (RPO L77) Manual, 4-bbl GK
        H.P., 4-bbl GL
  15400 283 195 3-speed, police GC
  154/156/164/16600 327 250 (RPO L30) Manual, 4-bbl HA
      300 (RPO L74) Manual, 4-bbl, H.P. HB
      250 H.P., 4-bbl HC
      300 H.P., 4-bbl, H.P. HD
    396 325 (RPO L35) Manual, H.D., 4-bbl 4MV IA
        Manual, T.I. IC
      425 (RPO L78) Manual, S.H.P. IE
      325 H.P., 4-bbl 4MV IG
        H.P., T.I. II
        Turbo Hydra-Matic, T.I. IW
        Turbo Hydra-Matic, 4-bbl 4MV IV
        H.P., 4-bbl Holley LB
        Turbo Hydra-Matic, 4-bbl Holley LC
        Manual, 4-bbl Holley LF
    409 400 (RPO L31) Manual, H.P. JA
      340 (RPO L33) Manual JB
      340 T.I. JC
      400 T.I., H.P. JD
      340 Powerglide JE
        H.P., T.I. JF
           
Corvette 19437/19467 327 250 Manual, 4-bbl HE
      300 (RPO L75) Manual, 4-bbl HF
      375 (RPO L84) Manual, F.I., hi-lift cam HG
      365 (RPO L76) Manual, mechanical lifter, 4-bbl Holley HH
      250 Manual, A.C., 4-bbl HI
      300 Manual, A.C., 4-bbl HJ
      365 Manual, A.C., mechanical lifter, 4-bbl Holley HK
      365 Manual, mechanical lifter, T.I., 4-bbl Holley HL
      365 Manual, A.C., mechanical lifter, T.I., 4-bbl Holley HM
      375 Manual, F.I., hi-lift cam, T.I. HN
      250 H.P., 4-bbl HO
      300 H.P., 4-bbl H.P.
      250 H.P., A.C., 4-bbl HQ
      300 H.P., A.C., 4-bbl HR
      350 (RPO L79) Manual, hydraulic lifter, 4-bbl Holley HT
        Manual, hydraulic lifter, A.C., 4-bbl Holley HU
        Manual, hydraulic lifter, T/I, 4-bbl Holley HV
        Manual, hydraulic lifter, A.C., T.I., 4-bbl Holley HW
    396 425 (RPO L78) Manual, T.I., 4-bbl Holley IF
           
Chevy II/Nova 114/116/11800 283 220 (RPO L77) H.P., A.C., 4-bbl PB
      195 3-speed PD
      220 Manual PE
      195 3-speed, A.C., 2-bbl PF
      220 Manual, A.C., 4-bbl PG
        H.P., 4-bbl PK
      195 4-speed PL
        4-speed, A.C. PM
        Powerglide PN
        H.P., A.C. PP
    327 250 (RPO L30) Manual, 4-bbl ZA
      300 (RPO L74) 4-bbl, H.P. ZB
      250 Manual, A.C., 4-bbl ZE
      300 Manual, A.C., 4-bbl, H.P. ZF
      250 H.P., 4-bbl ZK
      300 H.P., 4-bbl, H.P. ZL
      250 H.P., A.C., 4-bbl ZM
      300 H.P., A.C., 4-bbl, H.P. ZN
           
Chevelle 132/134/136/13800 283 195 3-speed DA
        4-speed DB
        Manual, low compression DC
        4-speed, low compression DD
        Powerglide DE
        H.P., low compression DF
      220 (RPO L77) Manual, 4-bbl DG
        H.P., 4-bbl DH
    327 250 (RPO L30) Manual, 4-bbl EA
      300 (RPO L74) Manual, 4-bbl, H.P. EB
      350 (RPO L79) Manual, 4-bbl, S.H.P. EC
      350 (RPO L79) Manual, 4-bbl, S.H.P., T.I. ED
      250 (RPO L30) Powerglide, 4-bbl EE
      300 (RPO L74) Powerglide, 4-bbl, H.P. EF
  13837 396 375 (RPO L37 - included with RPO Z16) S.H.P. IX
        COPO, S.H.P. IY
           


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A.C. - Air Conditioning
COPO - Central Office Production Order
F.I. - Fuel Injection
H.P. - High Performance
R.H.D. - Right-Hand Drive
S.H.P. - Special High Performance
T.I. - Transistor Ignition

 

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1965 327/350 Horsepower RPO L79
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1965 396/375 Horsepower RPO L37