I make 314/450 at the wheels and in full street trim go 11.70's. 3500 stall, 727, only difference is 4.56 gears. But I'm over revving through the traps. SO I should actually have like a 4.10 or 4.30. I'd have to do the math.
What do you 60 foot etc what are you going through the top end at? Back when i had my camaro, it ran 12.26@108 with 450 hp with 410 gears and a 29" tall tire i went through at 6000. switched cam and gears to 4.56 it ran 12.00@112 and went through at 6500. The Duster i plan to shift at 6000 should go through at around 5300 with 28" tall tire.