If he'll let you pull the heads and check out the cylinder walls on those two low cylinders for scoring or a bad head gasket(s) . . . then you might luck out. He's going to have to do it anyways . . . cause of 60psi in the one. If there's no aluminum skuff or scoring . . . you might be able to replace the head gasket(s) and decarb (power tune) . . . it's possible that will be enough to break down the carbon, free ring and restore compression.
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