This is just a thought. I realize that more ci is usually good but in a hunt for shorter, lighter, and more easily found pistons it's an option. Ir might pull a few 248s out of the scrap pile. Bore a 248 3/16" to 3.9060 and use a 270-302 crank. (4" stroke ) This gives 287.585 ci and would allow the piston compression height to be shortened .09375 with stock rods. I don't know if that's enough to make a difference. With a slightly longer rod it may. Would the lighter piston off set the loss of inches? Could the lighter stuff be wound tighter even with the 4" stroke?
