Fuel tank option???

[zergyo-71]

I was working on a 2015 Ford F-550 and I was wondering......"Why can't I use the DEF tank on my '71 as a fuel tank?". It is not very big, maybe 6 gallons.....but the brackets for it make it easy to install on any truck. Maybe install 2 or 3? Maybe one from a semi? Has anyone come across this?

[Ranchero50]

I think the definitive answer was a '69 Mustang tank between the rails in the back. Most cut holes in the bed but I would relocate the fill to the side and go through the bed wall.

I'm thinking about using a 90's F series front tank on my F350 and plumbing it through the cab fill point. Looks stock but opens up room in the cab.

[zergyo-71]

I would like to keep the spare tire in its place with a newer winch style like one of a 2003 F-150.

[sargentrs]

I'm also planning on a similar spare tire setup like you're talking about. My original plan was to install an F250 auxilliary tank setup. http://www.fordification.com/tech/auxfueltank.htm. The tank itself is available from the usual vendors. It's the skid plate and brackets that are scarce. I feel like I can duplicate or improvise those. Otherwise I've been kicking around a 15-16 gallon fuel cell mounted between the frame crossmembers behind the cab. Summit has one that I believe will fit. https://m.summitracing.com/parts/sum-290111can. I think it won't hang below he rails so much as to interfere with the driveshaft or exhaust. Just have to improvise mounting and heat shielding from the exhaust.

[zergyo-71]

The F250 aux tank looks nice. And to think that I used to own a 71 Sport Custom Camper Special.....back when I didn't know what I had!