Are the heads out of the box? I would think milling them to get to a higher compression (I'm assuming you're running race gas anyway) combined with skilled bowl and chamber porting that enhances the mid lift flows would make more torque/hp would help the ET more than a cam swap on your stock heads. From what I've seen it's not too hard to pick up another 10-15 cfm particularly in the .350-.500 range, so IMO that would be the rough equivalent of adding cam lobe "fatness" (as far as cylinder filling) without impacting the seat to seat cam/converter relationship the car already seems to be working well. pulling up the mid-lifts would be closer to making your flat tappet feel more like a roller with no downside. Bobby - This is what an out-of-the-box Trick Flow chamber & bowl look like
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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