If you have it all apart, might as well have it bored and new pistons if it's .10 over. My last engine rebuild the machinist told me if its .05 over best to have a rebor and new pistons.
I guess it all depends on what you what to do with it and how long you want to keep it.
I'm working on a 55 right now.. It came with a 350 block from the previous owner and I took the block to the machinist and he said the block was good no need to have it bored. But I decided on putting new piston and rings in it since it was all apart.
Restored old trucks, aren't like the old ones, mine probably won't put on 1000 miles a year, but now is not the time to try and save a few bucks. New pistons and rings, less than two hundred bucks.
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just my two cents..

Last edited by Bigjonh; 04/16/2013 1:39 AM.