I know if you just mount a stock tank on the reverse side, backwards so that the fill neck comes out driver side it wont clear the bed on the bottom. We tried that on my friends truck, he is now making a flat bed so it will work.
As for cutting out the mount for the fill neck of the bed and placing in on the other side, i was planning on doing that, it will look a little weird as its not going to hug the fender flare and it will open backwards (towards the rear of the truck).
As for routing my exhaust, im planning on having a short exhaust and have it exit out the bottom of my cab that way i dont have to rout it around any obstacles by the bed. (Drive line, 2 tanks, spare tire)
So with no exhaust problems, can you fit a 35 in the rear? I was told that since marlins truck was a LB he could fit the full size spare, since mine is a SB i cant fit it. The shock mount gets in the way. Can anyone confirm this?