70 dart 470 ci drag car build.

The Trick Flow heads can make power, a local racer had a low deck +030 383 with a 4.25 stroke crank, not sure of the displacement but it’s less than 500”. He had just bought the 240 heads when the 270s came out but he stuck with them and his low deck made over 750hp , how much more he could have made with the 270s I don’t know. But you need to think about that stock block you have and do you really want to blow it apart making more power.