Fueling & Injection - Can a 255 Walbro keep a -10 feed line pressurized?

I currently have an Eliminator pump, -12 from cell to pump, -10 to a Y underhood, -8 to each rail, -8 from the rails to the reg, and -8 return.

My problem is the Eliminator is overheating the fuel or something. After a 20 minute drive in the heat the pressure starts falling off. I am running the speed controller and it is still doing it. I only have an 8 gallon cell so I think it is still recycling it too much.

So my thought is to put a check valve on the aeromotive and run a 255 during normal operation and have the Eliminator come on @ 1psi of boost.

My concern is if the 255 can keep the large lines/rails pressurized by itself?

A 255 Walbro can keep a 2 inch+ diameter hose pressurized, it really depends on how much fuel your engine consumes whether the pump will work for you.