Will the oil drain back holes cause problems on a horizontal application? The jugs I purchased do not appear to have a ridge on them so I purchased standard rings to go with my pistons just to get it going short term. I have also bought .020 over rings and pistons for my jugs. Then once apart I can get them bored. They have so much blow by right now that it blew out the rear main seal.
I did not know about needing to grind the valves for adjustment my old 12 horse had adjustable lifters.
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