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Authenticity reference

Round-port Ram Air IV engine identity

numbers matching · reported

Evidence graphic summarizing Ram Air IV authenticity markers and common misidentification risks. 1969 Pontiac GTO Ram Air IV

Reference Details

Common issue
A Ram Air III, ordinary Pontiac 400, or later service/replacement engine represented as the original Ram Air IV assembly.
Confidence
reported
Correct value
400 Ram Air IV round-port engine evidence aligned with the car's documents
Where to check
Engine casting and date evidence, round-port cylinder-head evidence, intake and exhaust manifold evidence, engine pad/code context, partial VIN stamp where applicable, and supporting paperwork

Cars With This Authenticity Marker

1 linked car page.

Sources & Documentation