My 410 magnum made 581HP@ 6100. With a race weight of 3475lbs it ran 10.50s@125 with 3.91 gears,28" tire and a 4800 stall. So I think you're leaving something on the table.
Tom

10.56 at 125.6, with a 1.43 60 ft. E85, Hyd. Roller 410 magnum,full exhaust, 3500 race weight.