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Depends if it's been bored or not. Check to make sure that it's the oroiginal 4.000" bore or slightly more. Most machinists that I know don't recommend boring more than 4.030" on that block. If it's not been bored, then you may want to get it magnafluxed to check for cracks. If that looks OK, then you may want to use it to build your engine. Most good machine shops will check all that anyway before investing a lot of time, effort, $$$ in machine work.

Rev