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Chevrolet V8 Engine ID Codes

1974

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1970	1971	1972
1973	1974	1975

Model	Model No.	CID	H.P. (RPO Code)	Trans/Options	Suffix
Passenger	1BK/1BL/1BN00	350	145 (RPO L65)	Turbo Hydra-Matic 350, Police/Taxi	CMD
				Turbo Hydra-Matic 350/400	CMR
			160 (RPO L48)	Turbo Hydra-Matic 400, YF5	CKD
				Turbo Hydra-Matic 400	CMH
				Turbo Hydra-Matic 400, Police	CMJ
				Turbo Hydra-Matic 400, YF5, Police	CMK
		400	150 (RPO LF6)	Turbo Hydra-Matic 400, HEI	CSU
				Turbo Hydra-Matic 400, HEI, Police	CSW
				Turbo Hydra-Matic 400, 2-bbl	CTA
				Turbo Hydra-Matic 400, Police, 2-bbl	CTB
			180	Turbo Hydra-Matic 400, HEI, wagon	CSY
				Turbo Hydra-Matic 400, HEI, Police wagon	CSZ
				Turbo Hydra-Matic 350/400, YF5	CTC
				Turbo Hydra-Matic 400 wagon	CTU
				Turbo Hydra-Matic 400, HEI, YF5, Police	CTH
				Turbo Hydra-Matic 400, Police wagon	CTJ
				Turbo Hydra-Matic, YF5, Police	CTK
		454	235 (RPO LS4)	Turbo Hydra-Matic 400, Police	CWU
				Turbo Hydra-Matic 400, YF5, Police	CWW
				Turbo Hydra-Matic 400, YF5	CWY
				Turbo Hydra-Matic 400	CXA
				Turbo Hydra-Matic 400, YF5, Police	CXB
				Turbo Hydra-Matic 400, YF5	CXC
				Turbo Hydra-Matic 400. HEI, Police	CXT
				Turbo Hydra-Matic 400, HEI	CXU

Corvette	1YZ00	350	195	4-speed	CKZ
				Turbo Hydra-Matic	CLA
				4-speed, YF5	CLB
				Turbo Hydra-Matic YF5	CLC
			250 (RPO L82)	Turbo Hydra-Matic	CLD
				4-speed	CLR
		454	270 (RPO LS4)	4-speed	CWM
				Turbo Hydra-Matic 400	CWR
				Turbo Hydra-Matic 400, YF5	CWS

Nova	1XX/1XY00	350	145	Turbo Hydra-Matic 350	CMA
				3-speed	CMC
			160 (RPO L65)	Turbo Hydra-Matic 350, YF5	CKD
				Manual, YF5	CKH
			185 (RPO LM1)	Manual	CKB
				Turbo Hydra-Matic 350, YF5	CKD
				Manual, YF6	CKH
				Turbo Hydra-Matic 350	CKU

Chevelle	1AD/1AE/1AG00	350	145	Manual	CMC
				Turbo Hydra-Matic 350/400	CMR
			160 (RPO LM1)	Turbo Hydra-Matic 350, YF5	CKD
				Manual, YF5	CKH
		400	150 (RPO LF6)	Turbo Hydra-Matic 400, 2-bbl	CTA
			180 (RPO LT4)	Turbo Hydra-Matic 350	CSU
				Turbo Hydra-Matic 350/400, YF5	CTC
		454	235 (RPO LS4)	4-speed	CWA
				Turbo Hydra-Matic 400, YF5	CWD
				Turbo Hydra-Matic 400	CWX
				4-speed, HEI	CXM
				Turbo Hydra-Matic 400, HEI	CXR
				Turbo Hydra-Matic 400, HEI, YF5	CXS

Monte Carlo	1AH00	350	145 (RPO L65)	Manual	CMC
				Turbo Hydra-Matic	CMR
			160 (RPO LM1)	Turbo Hydra-Matic, YF5	CKD
				Manual, YF5	CKH
		400	150 (RPO LF6)	Turbo Hydra-Matic	CTA
			180 (RPO LT4)	Turbo Hydra-Matic, YF5	CTC
				Turbo Hydra-Matic 400, YF5	CSU
		454	235 (RPO LS4)	Turbo Hydra-Matic 400, YF5	CWD
				Turbo Hydra-Matic 400	CWX
				Turbo Hydra-Matic 400, HEI	CXR
				Turbo Hydra-Matic 400, HEI, YF5	CXS

Camaro	1GQ/1FS00	350	145 (RPO L65)	Turbo Hydra-Matic 350	CMA
				Manual (n/a California)	CMC
			160 (RPO LM1)	Turbo Hydra-Matic 350, YF5	CKD
				Manual, YF5 (California only)	CKH
			185 (RPO L48)	Manual	CKB
				Turbo Hydra-Matic 350, YF5	CKD
				Manual, YF5	CKH
				Turbo Hydra-Matic 350	CKU
			245 (part of RPO Z28)	4-Speed	CLJ
				Turbo Hydra-Matic 400	CLK
				4-speed, some YF5	CMS
				Turbo Hydra-Matic 400	CMT

N.B.2 - California Emission Engine

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Data presented here has been gathered from various websites, knowledgeable car owners and GM's "Information Kits." I have found several differences on numerous websites, particularly in sales quantity and pricing. I have used (what I consider) the more reputable sources and Chevrolet owners for the most accurate information available. Hopefully you will find the layout and how the data are presented acceptable.

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