thanks! It seems the more I do to it, the more I want to do to it!
I have an 85 axle I am now rebuilding and an e-locker I need to regear and install. On top of all that I am planning to install a new gas tank under the rear spare tire area and get rid of the one that is there. 
Welcome to the board.
I put a gas tank behind the rear axle and it took more work than I had figured but turned out sweet. I used a 19 gallon 2003 S-Blazer tank. It just fit between the frame rails, sits high up, and should never rust (plastic tank). A Toyota tank might be easier but this one was available for the right price...free. Anyway, when you get to it, show us some pics of the build so we can compare notes.
