We looked at the carb today and my friend agreed that the 750 is too big for this motor. jets in it are 72 and 80. Pouring fuel in. I just ordered a new Holley 650 double pumper and gasket set. He's gonna help me set it up and dial it in. Also on your recommendation we are gonna change the timing. He's been racing for years and definitely know what he's doing. I'll let ya know how it shakes out. Later.