A 235 can have interference problems between the connecting rod bolts and the camshaft core if the cam gets out of time, but they have a longer stroke than a 216. I don't believe a 216 will have any risk of contact anywhere, including the valves.
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!