Don't guess- - - - -measure. A standard bore 235 would have a 3 9/16" bore, 3.5625". Since the piston has a little clearance built into it, measuring the piston across the thrust faces 90 degrees from the wrist pin should give a measurement of around 3.561 or a bit less. Normal oversizes would be .020" over- - - -3.581, .030" oversize- - - -3.591, or 40 over, 3.601, etc.
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!