Head decision time

Here's what I think.........

Use the 273 heads (other opinions will differ), up grade the valves to 1.88 intake, 1.6 exhaust, cut them .030 to reduce the chamber volume, loose the sp2p, there is a member on here with a Holley Street Dominator intake for sale, BUY IT! Not familiar with the cam but it's lift range will work well with the rest of your combination.

Good luck, have fun.

Rumblefish has the intake for sale..........