Converting a 216 to full pressure rod oiling is a solution in search of a problem. It's also possible to make a silk purse out of a sow's ear- - - - -but it makes the pig look funny and they don't hear too well afterwards! If you bore a 216 block .060" oversize, a standard diameter 235 aluminum piston fits and the displacement goes up to around 224 cubic inches.
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!