Engine Code Location
Engine Code letters on 6-cylinder engines are suffix of Engine Identification Number, which is stamped on a pad located at right hand side of engine block and to rear of distributor. On V8 engines, engine code letters are first two letters in production code number. On all 350" engines, number is located on left side of engine block below front two spark plugs. On 455" engines, number is located on left side of engine block below rear two spark plugs.
| Engine | Code Letters |
|---|---|
| 250" 6-Cyl. 1-Bbl. | CCA, CCB, CCC, CCD |
| 350" V8 2-Bbl. | XC |
| 350" V8 4-Bbl. | XB |
| 455" V8 4-Bbl. | XF |
| 455" V8 4-Bbl. (Stage 1) | XS |
| 455" V8 4-Bbl. (GS Rivera) | XA |