Im building a new engine. its an old JP1 block, with BAE fuel heads 180 chamber. I can get a good deal on JE pistons. problem is they only build for veney/bnr heads. they have a different comp height. 1.430 (arias)vs1.612. manufacture says they can be used with different rod length. am I getting into this combination wrong? looking at a set of veney heads vs mine I cant really see a difference. I dont want to build an oddball combination. is there really that much difference between bae and veney pistons shape.