I have a auxillary fuel tank that fits 84-89 4runners, it mounts between the frame rails above the stock spare tire location.
You can still hang the spare tire in the original location but it might sit 2" lower.
You can see it at the North West Metal Products web site. They get $700 for it
![Shocking!! :shocking:](https://board.marlincrawler.com/Smileys/marlin/shocking.gif)
I want $250 for mine.
I would like to sell locally but if you want to pay shipping I'll send it to you.