Highest flowing sbm heads?

Isn't this where the Gen III Hemi can come into play?? The block is strong! And the heads are pretty good as well. And, it's a small block mopar. Wouldn't it be cheaper to obtain 600 hp at a much lesser cost on all motor ?? 6.4 is a monster with just a cam swap - carb intakes out there too. Holley really supports the GenIII hemi swaps