Keeping the Cabin Tank

[JNDewes]

I'm installing a Sniper 2 EFI system on my '68 stepside and wanted to go ahead and install a rear frame gas tank, but I hate the thought of a bed fill or even a side fill. Has anyone kept their cab tank and just added the additional tank? I'd love to keep the easy fill location.

[kwmech]

I have an auxillary tank on my flatbed while retaining the stock tank. Behind the cab above the driveshaft, between the frame rails. I filled up the entire space with a 52 gallon tank. It does however have its own filler

[JNDewes]

Thanks - how are they connected, and how do you ensure the new fill location is as high as the old one?

[dmjlambert]

I would do what Metaldoc did if I were inclined to put a rear tank in. https://67-72chevytrucks.com/vboard/...d.php?t=693071

[prateroad]

That seat tank is actually part of cab brace structure. I prefer to keep it that way.

[Steeveedee]

^ Not convinced. Have you some engineering analysis for back-up?

[MySons68C20]

Originally Posted by Steeveedee

^ Not convinced. Have you some engineering analysis for back-up?

Agree with this above.... When I pulled the seat tank I saw nothing that would qualify as a structural component.

I suppose it would add some shear strength but once the thin tank gets stressed or torn the cab would be full of fuel.

[kwmech]

Originally Posted by JNDewes

Thanks - how are they connected, and how do you ensure the new fill location is as high as the old one?

Separate tanks with a 6 port switching valve from a 1990