JW51, yes, the Buick 215 pistons have a compression height (pin center to piston crown) of 1.843 versus 2-1/16 inch for 216 pistons. By my calcs, that puts the Buick piston crown about 1/16" below the deck using a 235 crank. I'm probably going to need to regrind the 235 crank, so will see if they can offset grind it for just a touch more stroke to get that piston closer to the deck. A standard 235 crank could be ground 0.040 undersize, which would raise the piston 0.02" if offset ground.
