Mr Gerlbaum, you ordered a 38 gal tank with same year model as your truck?
What about sending unit? Did you do any mods to it?
How did you run your return line?
I have a 1984 F250 I want to convert to the 38 gal as there are issues with both of the factory tanks.
Thanks
My truck is a '87. I ordered a Spectra brand off ebay since they were $87 with free shipping. They come with a lock ring and pick up extension (really just 3/8 copper pipe). They are diesel safe if someone is worried about galvanizing on the tank (see my post at #19 here
https://www.oilburners.net/threads/which-33-38-gallon-rear-tank.80843/page-2#post-996216).
My sending unit was f'ed. So I ordered a new one. Another ebay special. Just searched "1987 ford sending unit diesel". They are $96.
I also ordered a new vent to put in the new tank.
It's hard to visualize until you actually do it, but what you do is take your sending unit and cut the pick up pipe. Then you solder in the extension that comes with the tank. Put the pick up and extension in the tank and with a flashlight shining in the vent hole, look in the filler hole and see how close the pick up is to the bottom, etc..., and adjust as necessary by bending.
I also suggest buying some Goop and when do the final assembly of the lock right/pick up. Seal the pick up and lock ring to the tank. I didn't the first time and it leaked out the top and I had to redrop the tank when it was low on fuel and seal it back up. It wasn't as low as I thought and I had to bench press the tank a few times until I could get the bolts in. PIA to do yourself.
I also went the extra expense of converting the suction/return pipes on the sending unit to AN. One of the pipes is 5/16 to AN 6 (return) and the other is 3/8 to AN 6 (suction). See link below. I wanted to be sure I wasn't sucking any air. I went from the AN to a compression fitting on 3/8 steel brake line. 90% of my return and feed line is 3/8 steel brake line. The only rubber is a few inches to the pre filter, pre filter to pump, and out the pump. Then there is 3 feet from the fuel/water on the frame to the back of the injection pump.
I just bought a use 3/8 bender so I am going to bend customer lines to remove all the rubber and use only compression fittings (I use stainless from Surplus Center steel not brass). I might keep a short run to the IP but I want steel for anything by the engine. For insurance, I also add a bit of Goop to the compression fittings.
https://www.summitracing.com/parts/...ztxaoDcmcGzWCROvFkmi3C4dZlj3h7OxoCUn4QAvD_BwE