[JLP]

RA-V had a couple of variations, 303 & 400. There were some other cid variations and supposedly had other RA designations. Depends on who at Pontiac (John Sawruk is probably the best) as to whether they were actual designations beyond RA-V. 400 is the most common talked about. The 303 was to be for Firebirds and 400 for GTO's.