Dual tank Question . .

[fryguy]

. . .Hey guys, been a while since I posted. Just recovering from the recent flood here in SE PA about 3 weeks ago. My house and garage were under 8 ft of water. Life is starting to get a little back on track.

Right before the flood, I purchased a 72 longbed Cheyenne 1/2 ton for parts. The truck actually was in better shape that what the pics showed. The front of the hood is crinkled and the grille and bumper are creased where the PO ran into a fence post. The question I have is that looking underneath it looks as though there is another fuel tank on the front right side underneath the bed right before the cab. Its square and black and looks like it could hold between 10-15 gallons(??) There is no other filler neck other than the stock filler on the left side of the cab behind the drivers door. Does sound familiar to anyone? Or is this possibly an home made job. I don't see any obvious fuel lines to the black box. I do follow the fuel lines from under the cab from the stock tank and it looks like one line travels along the frame to the back of the truck. Could there have been a tank at the back and it was relocated? I checked the RPO tag on the glovebox door and it doesn't mention anything about dual tanks. Its a 350cid Cheyenne 1/2 ton. Should I look for a specific code?

Also, it has a G80 rear which stands for Standard Locking rear. Does anyone know the Standard Locking rear ratio, lol? Was there a standard ratio or do they all need to be pulled and counted? Thanks for taking the time to read this.


Fryguy