Chevrolet Engine Codes

 

Codes appear on the right side of 6 cyl. blocks behind distributor & right front of V8 engine block.

 

1973

250 - CCK, CDB, CCA, CCB, CCC, CCD
307 - CHA, CHB, CHC, CHD, CMA
350 2bbl - CKM, CKR, CKA, CKL, CKB, CKC, CKK
350 4bbl - CKH, CKD, CKJ
454 - CWA, CWB, CWC, CWD, CWR

 

1974

250 - CCX, CCR, CCW
350 2bbl - CMC, CMR
350 4bbl - CKH, CKD
400 150hp - CSU, CSX, CTA
400 180hp - CTC
454 - CWA, CWX, CWD, CXM, CXR, CXS

 

1975

250 - CJJ, CJU, CJL, CJZ
350 2bbl - CMJ, CMU
350 4bbl - CMM, CMH
400 - CTU, CTX, CSB, CSM
454 - CXW

 

1976

250 - CCF, CCD, CCC
305 - CPB
350 2bbl - CMJ, CLF
350 4bbl - CMN, CUF, CMH
400 - CSX, CSB, CSF, CSA, CSW, CTU, CTX, CSM

 

1977

250 - CCC, CCD, CCF, CGA, 7SB
305 - CRA, CRF
350 - CMF, CKH, CKM, CKR, CHA, CHB, CHX, CKK