Think really hard about what the guy told you concerning the clearances. If there is only supposed to be .007 clearance between the piston and bore but right now there is .020. I know I'm not the greatest at math but to me this means that the cylinder is already .013 oversized for the piston. In other words it's already at a standard .010 over and then some. I can't believe any reputible machinist would even begin to recommend not boring the block to the next standard oversize.
In a worst case scenerio, do or die, your life relied on getting the engine back going, type of situation, I'd at a minimum pressure hone the block to insure the bores were round and then put at least .010 over sized pistons and rings in it. Doing it like this the bore would then be somewhere around .005, or slightly more, too large but even at that it would be alot better than what you've got now at .013 over.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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