Do a leak down test or at least hook up some compressed air to the spark plug hole. If it blows out the dip stick tube or crank case vent it's rings time. You will need to get the piston at TDC and come up with a way to keep the crank from turning when you do this. If it blows out the intake or exhaust then you have a valve issue.
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2264 with 54 GT deck
1641 AKA Black Jack with a 402-E Haban Sickle bar mower
JD317 dump truck
BX2670 with FEL
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