[K20chevy]

Originally Posted by mckustomfab

So i will start by saying that this may not be right, or even the best way, but this is how i mounted my 40gal suburban tank. And also this is my first attempt at a wright up so I apologize if its a bit scattered.

Starting with my 1991 R/V Crewcab conversion LWB, I removed the passenger side rear shock mount because it will be in the way of the tank. I then moved the rear crossmember as far back as possible and added a piece of steel to give the tank a little more to rest on. You can see from the pic how far back I moved the crossmember.



Then i held the tank up with a floor jack and go it level to see what i would have to do for the support that the front of the tank would rest on. Worked out that 2" square tubing sat the tank almost perfectly level, so i drilled and welded some sleeves in the 2" square and bolted it in.


To secure the straps i used a piece of angle iron running across the frame rail , I mounted mine close to the tank to make installing the tank less of a hassle.

I hooked up the straps and tightened it down. For clearance here is a pic of tank to rear diff cover clearance.


I will have to take a small section out of one of the ribs running under the bed floor. This is because the top of the tank humps up and the fill breather tub might make contact.


My plan for the fuel door is all based on speculation right now because i have not started on it and I am 8000mi away. But i plan to move the fuel door to behind the rear wheel well like it would be on a suburban. I don't foresee any problems with this but I will have to check when i set the bed back on. I also completely bypassed the switching valve switch and wired the pump into what would have been the passenger side tank. Everything seems to work good but i have to finish my outboard shock mounts before i can cruze around with it. For now it sits like this until the middle of October.


I'm excited to try it out but less so at the thought of spending about $130 bucks to fill it up!

I did a similar thing on mine by relocating the factory crossmembers foward and back. The rear crossmember looks just like yours is set up. I haven´t gottenaround to put my hitch in yet. Since one of your pics shows the hitch mocked up, do youhave a few more pictures on how the hitch clears?

I have a custom 45 gal tank in the back but I´m affraid that the hitch will not clear it when the first mounting hole needs to go in front of the two bolts holding the bottom of the crossmember in place.

Were you able to reuse factory holes in the frame for the hitch or did you have to drill all of them yourself? Does your hitch use 4 bolts per side???

Thanks for any info you can give me!