Fx the 7.5 which was the prelude to the 8.8 took over. Yea the trucks ran them up untill 86' possibly as far as 88' I have read conflicting opinions on that one. The granadas had the 9 inch it was an option along with the 351w My buddy had one it was an 79' It came with drums brakes not the versallies style disc. His dad did special order it but I have heard of other guys scoring 9 inch housings for thier mavs from granadas