273 heads on a (1977) 318 block

I thought i was aware of the different bolt angle and in my mind it were the bolts of the heads. Later on i realized that it's about the bolts that are in the intake manifold.
Well, that's what i think now. That would be no problem because i plan to use the 64 intake manifold as well as the 64 heads.
So a 2 barrel then