is the 91.94 piston out of the 450 or something? I don't know for sure I thought all the pistons were 95mm or 94.96,94.95,94.96 etc.....to switch to a 450 you would need a 450 rod and cylinder and piston....I thought the heads were the same from 89-98 at least maybe 89-2000 even, I could be wrong, that's just me thinking...
not sure if that's what your asking...maybe you could rephrase your question...and don't shout this time :twisted: