Quote Originally Posted by Glacier 73 View Post
Wouldnt waste money on VN heads in a van unless you want 500HP there really isnt nothing wrong with cast heads
they would be fine on a 308
Absolutely!

Heads are nowhere near as important on a blown motor, as flow is determined by the pressure from the blower, not the suction from a piston.

Every blown motor I've built has had fairly stock heads with strong springs. The early 308 heads work fine with a bit of a tidy up and good springs and maybe roller rockers. Spend your money on good pistons and rods.