I would go with the Trick Flow. I once ran the Indy 360-1 ported flowing 325@.700 with a large roller cam 268* .700 lift and I had no problem with low or mid power. I did run a loose vert@5400 stall. Not sure what's required in stall for your style of racing, but if you can run 8" similar to mine I don't see a problem with Trick Flow. My 67 Barracuda with a 408 ran 10.38@130 at 3300lbs on pump gas(11.3:1), so it was about 580+hp. Best top speed in quarter was 131 on drag radial. I would be willing to bet the Trick Flow heads have much better flow numbers down low and mid lifts than my Indys had. Hope this helps