best in-bed combo toolbox/aux fuel tank?

obie311 wrote:
I'm pulling a 5'er with an 8' bed crewcab. I've been thinking a diamond plate aux tank/toolbox might be handy to have and not compromise towing and backing the coach.

Lots of US made brands available but without metal specs posted it's hard to tell who makes the best ones. When I spec'ed truck bodies in my old job we used to make jockey boxes out of 10 ga. steel but with aluminum I don't know what's sufficient for this application.

I'm familiar with Dee Zee and Lund of course. I'm not familiar at all with RDS, Better Built, UWS, Aluminum Tank Industries.

Another 40- 70 gallons would be good and a decent sized tool box for jumper cables, DEF jug, lug wrench, cribbing, etc.

Thanks in advance for your help.