Nex, im still trying to crunch numbers with compression hgts. and rod lengths. You can swap the GMC rod into the Chevy and get a more readily available off the shelf piston. But the GMC rod in a GMC, has such a tall compression hgt., unless one of the rod companies i've been speaking to can alter an existing forging they have to create a longer length than the stock GMC 7" center-to-center length. Then that will only make us have to go custom with the piston and rod combos for them. Not many later V-8's had rods that long from the factory. The closest i've found that is a stocking shelf item for an H-beam rod is for a 440 Chrysler(6.760 center-to-center), and uses a Big Block Chevy housing bore. Would work ok in the 235, but is still too short for the GMC. There are still other options im looking at, but nothing absolute yet....
