Also Ram Air IV were made in 1969 and 1970 only. 1971 was when they went to 455 HO as the performance motor. 96 head are good big valve screw in stud heads. People use them on 455 to have a good set of heads but lower the compression ratio of the engine. If you are trying to market them that is the way to do it.
Restoring a 1968 400 4spd, numbers matching Firebird Coupe, Verdoro Green. Larry My old 68. Wish I had her back.
