Hey all, new to the site. I have been working on a 91 GMC 3500 4x4 3+3 that had a blown 6.2 diesel in it. I bought the truck with 54000km, absolutely no rot at all! I also had a 90 gmc 4x4 suburban with a 350 tbi that the body was falling off of. I have been working to swap the 350 into my truck, and have everything moved over and recently got it fired up. My problem is I want to keep the duel saddle fuel tanks, but I can’t find the proper sending units that will fit with in-tank electric fuel pumps. I installed an external fuel pump just past the tank selector valve, but it seems the engine is starving for fuel when I give it gas. I suspect it just doesn’t have the suction it needs to pull from the tank(s) through the selector valve. Does anyone know of a sending unit with in-tank electric fuel pumps that will fit into the saddle tanks on the diesel squarebodies? If there’s no such thing, my next plan is to move the fuel pump to between the tank and the selector valve, and install a second pump, one for each tank, and run the whole set up off a relay tied to my tank selector switch. I would rather have them in tank, but not sure that’s possible. Any ideas?