I'm rebuilding a 231 for my jeepster, The tech #s show my block turns out to be a "turbo block" early 80s, to get compression up, using flat top pistons I can only find .60 over. My very able mechanic was questioning boring more than .30 over until we discovered the turbo aspect. My question's are; anyone know where i can get .30 over flat tops, or what's the feeling about boring the block to .60 over? Whats the difference in the turbo block than the standard 231 block? Should I stick with my 225 fly wheel? And where can I get a rebuilt odd fire crank? The jeepster is mostly used for running around the island I live on, not over 55' or creeping around the Glades at slower speeds.