My feeling is that the 440-1 head, on a suitably sized short block, is the “easy button” for getting past the 800hp mark.

I also feel that the added port volume of the EZ 295 and 325 are going to have more potential as the power levels start to exceed 700hp...........with the bigger heads proving their worth as the cubes/desired rpm/power go up.

However, for around 500” and say up to say 725-ish hp, dollar for dollar it’s going to be hard to beat a TF270.