Which heads?

So I am trying to get an engine together for my sons 67 Dart. The original 273 engine is seized after sitting for years, so I bought a good used 1976 360. I bought a summit 6901 cam, performer intake, hooker headers, and speed demon 625 carb. Should I use the 67 273 closed chamber heads to boost compression or should I use the original 360 heads? I have blown up my brain trying to figure this out. I’m not changing pistons or anything like that just want the best bang for the buck. Thanks