415HP from 318ci IS POSSABLE!!

On my bench they top out at about 235 or so, but I've been told that my bench is a bit low, and all I can go on is my bench. These heads are 136 cc's. Larger valves don't tend to make more air flow up top, and larger valves tend to hurt low lift flows, and this is what you need when your running camshafts that are .550 or smaller. And the flow patterns need to be adjusted just a bit for higher lift cams but not much, as cams for small block dodges don't get too much larger that .650 lift. So this would only make the peak flow need to be at .550 lift.