Heads Up! Pondering Info?

Are you refering to the 302/308 heads or the magnum heads? This will be a project over time. Would a 360 magnum be a good choice to build? BTW the car will be a 75 Swinger with an 833 4spd or od. I have both. Car is now a /6 904. By the time the body work is done several deals on core engines will have come and gone.
Thanks