Hi can't find any good local deals on a good used 502 so I was wondering how big I can have my 454 done? I know that the old Mark 4 Hi-perf 4 bolt blocks they take 100 over is this safe on a newer gen 5 boat block? Thanks Charlie

well standard bore is 4.25".. so i would think .060" is all i would want to bore.. so 4.31" You might be able to go bigger if you check it with a sonic tester and make sure you have enough meat, plus to make sure your bore is centered in the cylinder. If it was me i would just go .030" to clean up the bore. That would leave you another .030" for cleanup if you scatter the motor.. You don't gain much by enlarging the bore...

Travis

HEY TRAVISS----4.25 + .060 = 4.31

I think travis does math the same as puder spell's

dammit.. well I can blame it on the beer or blame it on my education.. Al I gotta say is i took 7 class's of math in college and there was only 3 class's to complete

thanks tink..

NO PROBLEM--- I AIN"T NO MATH GENIUS EITHER.