Reference Details
- Common issue
- Replacement engines or shaker decals are treated as proof of the original configuration.
- Confidence
- documented
- Correct value
- W72 Pontiac 400 with T/A 6.6 identification, or market-correct L80 Oldsmobile 403 with 6.6 Litre identification
- Where to check
- VIN engine character, engine assembly/date/partial-VIN markings, shaker decal, emissions label, and billing history