318 build up

TK, cam is only 230 @ .050. Not large by anymeans. Since it's a street car, that is the way I'd go.
The 360 heads would certainly perform better at a higher RPM, but how often are we there at 4,500 plus lookin to go 6500 and possibly plus.

On the cheap, a 360 will do fine. I'll not bash anyone for it.