JMS also recommended we add a windage tray or an aftermarket pan. The extra stroke tends to dip the counterweights into the oil, causing foaming and loss of horsepower. Because the deck height is 8.200 on our block, the pistons are at zero deck. With the 58cc chamber on the AFR heads, the engine has a 10.9:1 compression ratio. That will work with pump gas and we will add a little fog of nitrous for some street fun.