Fueling & Injection - Custom fuel being built for my LS1 98 Astro

I have a 98 Astro with a 99 LS1 from a Trans Am. I am prostreeting my Astro and plan on a custom built fuel cell.

With the LS1 motor, I was able to use stock tank & pump, with a Mallory regulator. With the pro street and wanting my exhaust to exit both side of van, stock tank will not work.

I plan to have a aluiminum fuel cell to fit in the very back, between the frame rails and a crossmember. I want to keep it below the floor and not hang below bumper. It will be 36 inches long, 10 inches wide and 9 inches deep.

I bought a Trick Flow pump. I will use 6 an braided line with stock filter and the Mallory regulator.

Questions:
Is the return line high pressure and need high pressure line?
Do I need a vent in cell?
Probably stupid question, but a sump would probably be a good idea?

Any help or suggestions would will greatly appreciated.

Shouldn't have very high pressure on return side but would still use high pressure hose. You always need to vent a tank pump will create a vacuum. Sump and baffling is always a good idea. For best fuel control add the regulator after the rails on the return side.

Thank you Nasty.

I check today, some of the factory return line was braided high pressure. Was hoping to save a few dollars, but guess better just buy the good stuff.

With the newer high pressure fuel injection, we werent sure about the vent.

Baffles would be a good idea, being the tank/cell will be longer than normal.