'68 GMC 3/4 Ton & Gas Tanks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PDX68GMC · 12-12-2003, 03:48 PM

First post here:

A firend of mine has a 1968 GMC 3/4 PU. He just removed the behind-the-seat-tank, to make room for some 40/20/40 seats from a '02 Chevy.

Now were working on a upgrade to a GM TPI Fuel Injection setup. One of the requirements is a return line. The problem is that the only tanks he has now are poly/plastic saddlebags. This won't work, and also offers no way to monitor the gas level.

So what would the recommendation be? We went out to a local junkyard, and they have some early '80s GMC/Chevys with steel saddle tanks, these also have a return line plumbed already. We would just need to swap over the bracketry.

Are there other/better tank swaps? Someone here mentioned a tank by the rear axle. Anyhow, we need a viable setup.

Thanks,

-PR
'68 GMC 3/4

jorgensensc · 12-12-2003, 04:23 PM

look Here for the FAQ on rear tank install.
Hope this helps a little!
And it does have a return line.
Also Fuelcellman makes great fuel cells from what I've heard.

Longhorn Man · 12-12-2003, 05:29 PM

Welcome to the board.

Why can't you run a poly tank? Many new cars and trucks run them, and they are under the AMGeneral Hummer (I guess it is just a chevy Hummer now huh?)

PDX68GMC · 12-12-2003, 05:38 PM

I wouldn't want to try and fab a return line on a pure poly tank. Alot of the ones I've seen use a poly outside, and a steel inside.

Besides, the more "factory" the better.

-PR

12-12-2003, 03:48 PM	#1
PDX68GMC Registered User Join Date: Dec 2003 Posts: 4	'68 GMC 3/4 Ton & Gas Tanks First post here: A firend of mine has a 1968 GMC 3/4 PU. He just removed the behind-the-seat-tank, to make room for some 40/20/40 seats from a '02 Chevy. Now were working on a upgrade to a GM TPI Fuel Injection setup. One of the requirements is a return line. The problem is that the only tanks he has now are poly/plastic saddlebags. This won't work, and also offers no way to monitor the gas level. So what would the recommendation be? We went out to a local junkyard, and they have some early '80s GMC/Chevys with steel saddle tanks, these also have a return line plumbed already. We would just need to swap over the bracketry. Are there other/better tank swaps? Someone here mentioned a tank by the rear axle. Anyhow, we need a viable setup. Thanks, -PR '68 GMC 3/4

12-12-2003, 04:23 PM	#2
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	look Here for the FAQ on rear tank install. Hope this helps a little! And it does have a return line. Also Fuelcellman makes great fuel cells from what I've heard. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

12-12-2003, 05:29 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Welcome to the board. Why can't you run a poly tank? Many new cars and trucks run them, and they are under the AMGeneral Hummer (I guess it is just a chevy Hummer now huh?)

12-12-2003, 05:38 PM	#4
PDX68GMC Registered User Join Date: Dec 2003 Posts: 4	I wouldn't want to try and fab a return line on a pure poly tank. Alot of the ones I've seen use a poly outside, and a steel inside. Besides, the more "factory" the better. -PR



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