Stock compression height is 1.720. You can get some stock replacement 4 eyebrow type pistons with a 1.741 compression height. That might not sound like much, but it makes a difference. Get some Magnum heads or 302 heads and get them down to 55cc, have the block bluprinted to 9.6 (which is the factory spec, they're always high) use the .021 thickness head gasket and you have a 9.1 motor. Just right for idling around stuck in traffic in the summer and will never spark knock. Cheaper than setting up a quench motor. Those pistons only cost about 100-125 bucks, whereas the KB167 quench type pistons are around 400. Even if you choose to save money and not blueprint the block deck, you're still gonna have respectable compression considering the stock 318 blueprints in the 7s compression wise. You'll have enough to support a 325 HP 318 with smart parts choices.
