maybe we should have a thread to explain the diff between talk and tech so daggs dosen't have to work so hard, but to the question at hand, i have heads similar to afr 185's (dart pro one) 76mm mass air 65mm tb, 24 pounders, 190lph pump, cobra intake, e303, and it's a 306 and am close to 300 i would imagine, so it's possible but as said before the big intake and tb may actully hurt you