Bed swap questions and advice.

[Crash]

So, as some of you know, my MJ has a utility bed on it currently. Found out that it is partially welded to the frame, which is lame. Pics are in my build thread. I have a standard MJ bed on my project that I want to swap on, most likely. Or might even consider a flatbed of sorts. 

 

Anyways, for those of you who have done flat bed or other bed type swaps, what did you do for fuel tank mounting. I was thinking maybe just a couple pieces of steel running across the frame from side to side. 

Even if I swap a factory bed, I think it will make things easier overall. Thoughts, concerns, or constructive criticism? 

 

Thank you.