It’s not a solution for everyone, but you can always relocate the gas tank under the bed/behind the rear axle and use a tank that is more readily available. It’s an old hot rod solution that a lot of truck guys have used to get rid of the behind the seat tanks used on many of the 50s-60s full size pickups.











On the plus side; the mods are fairly simple and can usually be done in a day or less, parts are readily available new, you will pick up 3-5 gallons more fuel capacity, no welding is required, the cost is going to be comparable or cheaper than a custom made tank.

The down side; you will lose the spare tire carrier, it’s not completely bolt in……. there will be modifications required. If you’re using an in-tank pump you will need to switch to an inline pump or find a tank and pump that is compatible with the fuel system you’re using. The sending unit will likely need to be modified to be compatible with the stock fuel gauge. The tank may need to be modified for a fuel return line.


I used a 1958 Chevrolet passenger car tank on mine (the 1959-60 tank would also work and the fill neck is centered, but I happened to have a 58 tank laying around). Of course after it was installed I found out it had pin holes in it and had to replace it……at that point it was no big deal, and a new repop 16 gallon tank was less than less than $100 with free shipping. You can look around , besides the Chevy tanks, fist generation Mustang tanks would probably work too.



Besides the tank you will also need: fuel pickup/sender, tank straps, short piece of fuel neck hose, non-vented gas cap, fold down license plate holder and 2 pieces of square/rectangular tubing (to make the tank top supports). All the parts are available new.



I did a write-up on installing a rear tank on my build thread that gives an idea on what’s involved.



http://www.mightyram50.net/vbulletin/showthread.php/4866-87-Ram-50-SBC-T5-swap



Like I said, not for everybody but it is a workable solution.