I should also mention that motor had an original magnesium mopar cross ram that supposedly came from a LO23 car. Builder said a good single 4 carb and manifold would produce better numbers but motor was built for a clone hemi dart thus the crossram.
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Savoy your 572 is a nice package. I can see a crossram on this 572 too, I’m just not starting off with one, didn’t want to leave hp on the table so to speak. An acquaintance has a 572 in his Dart. Stock Indy 426 heads with the raised port. 13.5 Cr. Mild roller cam. Made 854hp with a 1050. Changed to a 1250 and made 886hp. He said that the 1050 ran better at low rpm. We’ll see how that compares to mine. Not sure how much less hp the crossram would be, Ive read it’s a quite a bit.