What will my 340 run? and what intake and carb?

How much tire slip do you think you will have with a 12" wide drag radial?

You are going to grenade your transmission.

BTW My 340, 4 speed runs 13.2 @ 105mph through manifolds turning old skinny Bias Ply E70-14 Tires.

13.2 should be realistic without some of the mods in your build.