I'm building a 306 patriot freedom heads, valve train good to 600 lift KB pistons 9.4 to 1 comp ratio 4.10 gears 5 speed. from what I know the heads flow very close to edelbrock performer rpms. I'm thinking ether a comp cam(218/224 @ 50 & .512/.512) or ford racing f303 (226/226 @ 50 .512/.512.. and possible going with 1.7 rockers. let me know thanks..