Adam, the head as choked off at about 215cfm. Put some heads that flow in the 235-240 range and it would likely be in the high 3's, 380-395 is my guess.
It's really a basic build and will have a 2500 stall, 904 and 3.23's with a short tire. We're guessing, hooking up and tuned right it should run really low 13's in the 104 range.