Hey guys just a little update possibly on some usable tech for the fuel system in this situation.
Instead of wasting money on a walbro, get a single or dual Bosch 040 60mm housing fuel pump setup with a surge tank.
Plumb in a small in tank fuel pump in the stock WD-21 fuel pump location in the tank to pump fuel from the tank to the surge tank.
The surge tank will keep your race pump (or pumps depending on if you want single or dual pumps) happy and wet and from ever having fuel starvation, even if you are wheeling in a super crazy position.
Dual 040 pumps should support 700-800hp easily.
Also! Look at Wish.com for the no name Bosch 040 fuel pumps... Last I saw they were dirt cheap and they work and have good reviews! Wish.com also carries a variety of fuel surge tanks for single and dual 040 60mm pump setups.
Peace!