You will need moar fuel line IMO. The stock line isn't enough with a sucking fuel pump. You could weld on a sump and put an elec pump on to push the fuel up front and have the regulator up here. That is what my fish had. It worked at 500 HP. It will get AN-6 lines now with a pump and filter at the rear, drawing from a sump on a new Canadian tank.
I am pulling a set of 13.5 wide ET streets to replace them with 315/60 DRs. Those ET Streets were worthless on the track and after seeing the car get loose like taking off on a gravel lot it isn't worth the risk.
Waiting on the build thread where he gets 550 HP outta a vac secondary 750 carb. Than again, I am also waiting to fire up my 416 with the solid cam.