Please help plumbing new under bed tank for TF truck

[Jemo]

I just got my conversion tank that mounts under the bed but have some questions. I thought it was frowned upon (or illegal) to run your fuel line from the bottom of the tank? This tank has two 3/8" NPT bungs - one for the fuel pump and one for a return line if using fuel injection. Second, since the fuel bungs are so low, a gravity fed fuel pump is almost out of the question because you can't get much lower. Any thoughts?

Which fuel pump are you using? Is there an aftermarket fuel sending unit that has a port that pulls fuel from the top? I only see that happening in tanks with internal pumps and late model vehicles.

Jeff