Which heads wpuld be better?

A good cam suggestion depends on the weight, gear and tranny being used, and the engines size and comp. ratio. Also if the heads are ported or not. Since were not there yet........
I can recomend a cam like a MoPar Hyd. 292 /.509 lift. It would do the job. Then someone else would give there 2 cents and so on and so on and so on.
You can call someone for a custom grind without paying big money. Scott Brown of straight line performance is a fav I see, Racer Brown is another. Or if a major company is more your style, Comp or Crane can do it for you as well.
You'll just need to know all the above before asking.