My old Chevelle, 3350lbs with a 406 running 12's ran faster with a glide, footbrake or transbrake. 4800 should be enough stall for a 406 running in the 11's
Bill i have same set up as you I ran 11.70 i switched to 456 gear just waiting for next year to see what it does. I have TCI trans and i think im putting a brake in to.oh also the 11.70 was with my 373 gear.