Should be plenty.
Note the Gonkulator predicts 200hp for your build.
My rule is roughly you need 2cfm (at 1.5" Hg) of carb for each HP, then subtract 10%

So 200hp needs
200x2=400cfm - 10% = 360cfm.

Each of the 32/36 webers (old Pinto 2000 carbs) makes about 280 cfm at 3.0" Hg, or 200cfm at 1.5" Hg, so the pair is 400cfm.
Just perfect.