It's a local AU company that makes the cell and hanger called Aeroflow. There's a few places over here that makes things like this, Raceworks is another I can think of. It's a 15gal cell so it will do the job pretty well. Pumps are 450L TI/Walbro pumps.
I have the exact same setup in my car except I set it up with 2x isolated negative terminals because my primary pump I run PWM courtesy of a Jaguar fuel pump controller to lower the fuel pressure at idle and cruise. Cuts down on heat and stress on the electrical system + the pump itself.
On a fairly dialled tune this 5.3 should get some pretty awesome mileage being a smaller motor and a fairly mild camshaft. I won't be tuning it but will probably get sucked into getting it running on the Haltech so it can be driven to the dyno hahaha
On corn juice I shoot for about 400-500 tire HP per pump being SUPER conservative. The data i've got on my own car running flex, some other cars - 1 running 9's N/A on E85, twin 044 Bosch pumps, plus the hub dyno data i've got on another car I helped put together a while ago has 2x Bosch 044 pumps running 14-15psi of boost through an S475 turbo on another 5.3 made 715hp to the ground on pump gas at about 600m elevation. Those pumps are around 270'ish L/hr at 60psi. His fuel curve was pretty fat and it would have made more power if we took some fuel out but being stock bottom end deal we didn't want to melt it to the ground because it had to be driven 200 miles to get home home
