This is the new "walk thru frame" I invented. The rear axle does all its own locating and staying in place.
Just kidding...:hehe:
Using an aux tank from 2500 Suburban as it fits the frame and sits flush under the bed.
Im fabbing two x-members for the new tank (three is you count having to replace the old gas tank X-member due to rust-thru)
Im using the Suburban tank straps to hold it in, just had to cut the old brackets off the Silvy x-members and tack them in, and simply cut small holes in the outside x/member to slide the trap-nuts into so I can bolt the straps in.
I have to design upper straps that the tank will press up against when it's finish mounted, too. Also have to box in the frame on either side of the tank.
The inner x-member will also double as the upper shock mount when I get to that step.
As you can see, it sits up in there nicely. The sump is that square-ish looking drop-down in the front, hiding behind the clamp.
Only issue I have will be the fill hose. Ive got some ideas on that yet to go. I could 90* inside the frame and snake it around to the oem fill door, cut a hole in the side of the frame and run the hose outside to the oem door, or do something kinda cool using an aftermarket fill tube thru the rear stake pocket, or cap off the old fill tube and cut in a new one on top of the tank. Havent decided on anything yet.
I bought this aux tank without a fuel pump assembly. They come with pump units that either have sending units or dont, and I obviously picked one with so it'll work like normal. To use it in my truck, I took the pump out, which runs horizontal thru that white plastic holder on the bottom. This allowed me to turn the old feed line into the new return line, and the old 5/8" (!) connection for the vapor system into the new feed line, using a piece of 5/8" fuel hose run thru the old pump holder as the "sump". The old 5/16" return line then becomes the tank vent.
On to get the X-members welded by a professional on my route.
