© CaminoWorld

1974 El Camino Engine ID Codes

 

 

The engine identification code consists of the engine assembly plant, the engine assembly date, and 3 letter suffix indicating the cubic inch displacement, the horsepower rating, and generally, what type of transmission was to be installed with the engine. Manual transmissions required a bushing in the rear of the bellhousing where an automatic transmission did not. Many engine "accessories" such as the carburetor, distributor, and exhaust manifolds were not installed at the engine assembly plant but rather at the final assembly plant. Six-cylinder engine codes are not known.

Engine

Transmission

Notes

Code

Size-Carb

HP-RPO

    
CMC 350-2 145-L65 Manual  
CMR 350-2 145-L65 Turbo Hydra-Matic 350/400  
CKD 350-4 175-LM1 Turbo Hydra-Matic 350 YF5
CKH 350-4 175-LM1 Manual YF5
CTA 400-2 150-LF6 Turbo Hydra-Matic 400 2-BBL
CSU 400-4 180-LT4 Turbo Hydra-Matic 350  
CTC 400-4 180-LT4 Turbo Hydra-Matic 350/400 YF5
CWA 454-4 235-LS4 Manual  
CWD 454-4 235-LS4 Turbo Hydra-Matic 400 YF5
CWX 454-4 235-LS4 Turbo Hydra-Matic 400  
CXM 454-4 235-LS4 Manual HEI
CXR 454-4 235-LS4 Turbo Hydra-Matic 400 HEI
CXS 454-4 235-LS4 Turbo Hydra-Matic 400 HEI/YF5

YF5: Equipment required on California vehicles includes A.I.R. and camshaft with longer valve overlap.