I would not shot peen the block.i would power wash it and put it in a barrel and fill it with evaporust and leave it in for a day or two.buy 20-25 gallons and do one side of block and flip the engine and do the other side. Would cost you $500 in chemical but would be clean.
Last edited by luzl78; 09-27-2025 at 06:44 PM.
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