I purchased an extra Filler neck to have some steel NPT bungs welded in.
If you can weld it yourself or remove, weld, and replace at the same time, it
will save you about $200. I want to just replace when I remove the original.
I will run a 3/8" and 1/4" SS Braided filler and vent lines to the tank. The
Diesel Fuel Transfer Pump will do 12L/Min. It is mounted inside the Tank.
EPA Regs say you have to pull from the top of the tank. DOT Regs say you
need to use OEM or better parts.
One last thing to consider is the Truck's Computer throwing a Code. The
System needs to be Sealed. At least that is what I had to do for my'08.
It would throw a CEL code like the Gas Cap was off or loose. The other
thing would be if you tried running just a drain line to the main tank,
The Fuel Gauge would stay at full, so the computer would throw a code
that the Fuel Sender was bad.
I will try and get a couple of pix of the setup on my '08 Big Horn. I used the
bottom 8" of a Bed Rail Tool Box to make the tank and I still have some
storage in the Tool Box. 26 Gal Main Tank and another 36 Gal for the AUX.
With the Hemi getting about 17 MPG on the road, I would get about 950 miles
for a full Truck.
Malodave