Just a few minor tweaks to the pistons and rods are needed. There's also a piston for a Mitsubushi 4 cylinder Diesel forklift that can be used by putting bushings in the wrist pin bores to fit the 216/235 piston pins. That diesel piston has a crown thick enough to machine it level with the top of the block with a variety of altered crankshaft strokes. A "stock" engine is just a blank canvas that an "artist" of a machinist can use to paint a masterpiece! Phil, with different connecting rods and a stroker crankshaft, a 216 block can get slightly over 250 cubic inches- - - - -and still look original from the outside.
www.ebay.com/itm/163130694013?Jerry