Because of the size of he wing, loading above 30oz @ sq ft woud be too much. The air foil was designed to provide only so much lift at a given speed so you will have to go much faster. I would venture a guess of about 28oz@sq ft at speed would be about as much as you could expect. That would put it at about 3.5 lbs. That is very light for a .46 engine.
I do not believe that that airframe can take the vibration from that size engine. I know the stock elevators and rudder can't take the stress at necessary speeds. It's also my belief that power will have to be fed in very slowly and the airplane be up to speed before full throttle could be used or the plane would torque around the propeller.
I think that a light weight .40 or a hot .28-.32 would be a better hot rod if you want more than one flight. I'll fly mine with a .074 and be happy.