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.