with throttle bodies it depends what cams you use, some wild cams and some forged conrods and pistons (even a crankshaft if moneys good), but it wont be much more, might be up there with a standard vts engine
all depends what you have uprated tbh
youd be much better starting with a vts lump, and a lot of people say they wish they had gone the forced induction route
still cant beat the sound of throttle bodies though
