73-87 gas tank question

[dmh13433]

Hi, Wondering if someone can help out here.
I shortened a V3500 crew cab(1989) 4x4, to a short box.
I am wondering about buying two new tanks.

First question is...can I get a sending unit with a larger line coming out for my diesel engine? I need a 3/8" two line.

Second question...anyone ever tie these two tanks together so you don't have to fill from both sides and you don't need a switch to go from one tank to the other? I would rather fill from one side, and draw fuel from one side. I was thinking of brazing a nipple on bottom of both tanks and connect them.

Thanks

I'm close to finishing my project. I will have to post some pictures of the progress I have made. I used a 12 valve cummins, NV4500, NP205, Dana 80.
next is working on exhaust. Trying to fit 4"(its a bit tight). And I need to figure out fuel tanks.