If you're not concerned with flow and all the other aspects of peformance builds, Why bother with the higher compression dome tops ? Todays fuel doesn't burn well under higher compression anyway. Stinky rich exhaust fumes wont be pleasent, especially with the top down
I would use the 302 heads if for nothing more than their hardened exhaust valve seats.
Research head to exhaust manifold conflits and test fit everything or you might crack your stock 273 manifolds.
