318 low budget heads change

I vote 360 head because they are free!! Spend 65 bucks to have 'em milled .040 to help the compression, and the rest of the money you saved by using the free heads can go toward the cam. If your using headers, the 360 heads would see positive flow gains over the 302's. If you add the mild cam, the 360 heads would be even of more benefit. And the '78 heads have hardened seats for unleaded fuel...