Post 4 nailed it. I’ve done it twice and it’s easy.
Since I have the tank out, I buy a rear sump kit and move the outlet to the pump to the rear of the tank where it should be.
Then I buy steel -10x1/2 pipe male fittings (two of them) and I weld one up in the passenger side corner of the tank near the top and the other about in the middle of the tank and I use that for a vent.
As a general rule of thumb, you want the vent to be at least the diameter of the outlet. That’s why I use -10 for the vent because I use -10 for the pressure and return line.
Vent sizing is even more important with a return line because the fuel blowing back into the tank generates more gases (fumes) that need to be vented.
No need for a fuel cell and all that extra work.
