Originally Posted by RamAirZ
sounds like a sweet set up. You think with the x4262h cam with the PP heads, q-jet aluminum intake and carb would make around 250-270 or so?
I have no experiance with that type of combination so I couldnt say, but 250 dyno HP seems reasonable. I wouldnt use the 416 heads, the runners are to big for a 307 plus the heat crossover going into both exhaust ports bothers me, stick with the 520s, It was a long time ago but Ive done a 350 with 520s ported, solid flattappet, 11.1 comp, 450 dyno HP@ 6500 rpm, 70 nova ran 11.30s @ 116, car showed about 390 Hp going down the track, which tells me the car and drive line needed some work.