I've made 700 HP with a 518 C.I. 910.25 to 1 comp. ratio low deck with MCH CNC Eddy RPM on pump gas, I will(hopefully) be dyno testing a 527 C.I. 12.4 to 1 comp ratio 440 bock with SR heads with max wedge ports soon. Hopefully in the next three weeks if everything at the dyno shop goes okay I will post the results, my Eddy heads flowed 310 CFM at 28 inches at .600 lift, my SR flowed 340 CFM at .600 lift at 28 inches on the same bench on two different days months apart. The 527 has more cam also and it will be tested on race gas I hope it doesn't break on the dyno and make a mess and embarrass me