Authenticity reference

Engine-source/VIN context

numbers matching · documented

1977 Pontiac Firebird Trans Am in Brentwood Brown, front three-quarter view 1977 Pontiac Firebird Trans Am W72 400

Reference Details

Common issue: Confusing base L78 400 or Oldsmobile L80 403 cars with W72/T/A 6.6.
Confidence: documented
Correct value: Engine table lists W72 Pontiac 400 with VIN engine-source character Z
Where to check: VIN engine-source position and engine documentation

1 linked car page.

1977 Pontiac

Factory Pontiac Firebird Trans Am configuration