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Chevrolet V8 Engine ID Codes

1965

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Model Year
1955	1956	1957
1958	1959	1960
1961	1962	1963
1964	1965	1966
1967	1968	1969
1970	1971	1972
1973	1974	1975

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

1965 327/350 Horsepower RPO L79

1965 396/375 Horsepower RPO L37

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