Pull the spark plugs and see if you can borrow a borescope to look inside the cylinders. I bought one from Harbor freight awhile back, but the scope is too big to go through a plug hole. It still lets me look through bigger holes, but all I can do with a cylinder is get a long-distance view. Snap-On makes one with a 1/4" diameter scope that's very handy.

235/261 rod bearings are the same- - - - -anti-rotate tabs on the rod and cap.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!