318 top end build

Hi all,

I just purchased a 72 Duster with a 318 and I am looking to get some more oomph out of it without changing the bottom end. Would adding some #302 heads, a new cam, and intake be worth it to get some power or is it not worth it without bottom end mods? I am getting a set of TTI headers too so I have some ground clearance. Current headers are street draggers.

Thanks,

Michael