my 2 cents worth - get a larger carb , look at your gearing , exhaust .
When I built my 440 it had 906 heads with home port/cleanup ( 10.4 comp),825 Mighty Demon , M1 single plane with 1" open spacer , 509 cam , 4200 stall, 3.9 gears and 28" radials . At around the same weight , over 3750lbs , it ran 11.80's

Tex


New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive