Best guess on 416 motor

IMO, you are leaving a lot on the table with that cam with the worked heads. If you are set on using that cam, at least go with some 1.6 rockers to up the lift. The carb has already been addressed, Holley HP950.
Don't rely too much on those calculators. I know of 3400 lb Dusters with less than 500HP at the crank going in the 10's. If you have your suspension set up right and can hook up, you can probably get in the 10's with the combo you have. Hopefully I'll find out soon if I can get in the 10's with mine.