Reference Details
- Common issue
- Replacement or restamped blocks; SS/Stage 1 engine-code claims on a base 455 car require separate supporting paperwork.
- Confidence
- reported
- Correct value
- Original 455 engines carry an engine serial number that matches the VIN sequence; base 455 GS/GSX engine-code context is SR for 455/350 hp, while SS is the 455/360-hp Stage 1 code.
- Where to check
- On the 455 CID V-8, the engine number is between the two front spark plugs and the exhaust manifold; the production code number is between the two rear spark plugs and the left exhaust manifold.
