QuietWyatt

Hey, thanks so much for the replys @Tractorman @Dieselfuture, i really hope i am overthinking it. Great idea to call some people and ask, when i do that i will report back my findings. Really appreciate the replys!

Hi there, First time posting, but i have been reading posts for a while now, really appreciate all the help this forum has given me in doing a 1998.5, 5 speed, 24V Cummins swap into my 1976 Chevy 3/4 ton. I am now working on the building a fuel tank, I'm halfway done building it. I just was about to drill holes, and I've run into a question i have on where I'm going to run the return line from the VP44, and also from the Fass 95g lift pump i have installed. This picture represents where I would like my fuel tank to be, its 65" wide, 32" tall, and 6" deep I have scrapped the idea of using the factory Chevy saddle tanks, as i want under the flat deck tool boxes and those take up valuable real estate. My question is where the return line should be going into the tank from, I know the VP44 is a very sensitive girl, and i don't want to disrupt it in causing premature failure. My plan was to plum the return line into the bottom of the tank, thus creating less aeration when the fuel returns. But since the tank is so tall, after calculations, the return line will have to overcome about 0.866 PSI of head pressure from the fuel (if the tank is full), which isn't a lot, but it seems the return line should be 0 PSI. My other option is running the return line up and dropping in from the top of the tank, but i will still be overcoming 2.5 ft of head, which equates to the same 0.866 PSI (all the time, rather than getting smaller as the tank drops). My other option is running to the top of the tank, and then having a pipe inside the tank, bringing the fuel too near the bottom, but if I'm thinking correctly, that would cause similar head pressure acting on the outlet of the return fuel, as the first option. I haven't found a lot of information around the internet of people running a MAIN tank from the bed like i have, i have seen a lot of AUX tanks in the bed, which either pump, or gravity feed into the main tank, which is in between frame rails or what have you. What i have gathered is a lot of people are running an auxiliary tank, that gravity feeds into their main tank. They have reported, that when the AUX tank is full, you cannot open the main tank cap, as the fuel will pour out. if this is true, then their return line would be running into the main tank, and overcoming a similar head pressure like i am describing. Any and all input would be greatly appreciated at this point, because i want to get the fuel tank built, and sealed up. Thanks so much! Wyatt I Should've mentioned it in the first post, But even though i don't want to do this, i am slightly open to running a small main tank in between the frame, that this tank feeds to, and i run everything off of that. I would like to keep it simple and run only this tank ideally, but if that's what i have to do, then I'm open to making something work.