318 build suggestions?

If going TF's I'd really shop for a 360+ engine, there more designed for 475-525 + hp, a 318 is gonna need to turn some decent rpms to get there 6,500-7,500 rpm. Would they work on a more mild 318 ? 400-425 hp with a fairly mild cam possibly, probably better then most would think but why under use them to a huge degree.