Since a full size spare doesn't fit under the bed, I had no choice of installing it inside the bed. The idea of installing it at an angle was cool because it looks good, but it blocks rear view. On road it's not too bad but when backing up in a thight spot on the trail, being able to see obstacles or ditches at the back of the truck is important. That's why I decided to install it flat.
I used two 2"X2" tubes welded together on which I welded a hub from my old IFS parts. The tube assembly is bolted to the bed and the tire to the hub and can be locked with a locking nut.

I calculated the position of the carrier to hold the 35" spare and the 38.5" Swamper. I also left some place at the front so a tool box can fit. (I will built it later).