My pickup has a 20 gallon tank behind the seat. Seems like I am
always at the gas station. I can only find one tank to add under
the bed. Unfortunately it would displace the class III hitch and
the spare. Can someone recommend a tank for under the bed and
forward of the rear axle?
1971 Chevrolet K20
3/4 ton pickup
Fleetside long bed
Manual Transmission - Muncie 465
Transfer case - New Process 205
Go dual fuel and add a big propane tank in the bed. Or engineer a dual
fuel cell installation ("fuel cell" as in a racing rubber bag, not an
electrical plant as on Apollo CSM) on either side of the driveshaft
with a fill pump off the main tank. (Hoop the driveshaft while you are
at it, lest it fail, and flail the cells.)
Of course, you could go the hillbilly way, and buy a diesel fuel bed
mount tank, and ignore all those sissy safety warnings about not using
it for gas or plumbing it into the vehicle. Around here that's the
I got a 72 GMC 3/4T 4x4, 4sp when it was a year old and it had factory
dual tanks and provisions for a third tank. The aux tank held about 16
gallons and fit between the frame and the bed side in front of rear
axle. Mine was on driver side but I had seen them on both sides. You
might find one in a old bone yard. If hand a valve on floor between seat
and door for tank selection and a switch/knob on dash to swithc the
gauge amoug tanks. It was all OEM too. It was great om trips because I
would burn the cab tank dry and you could hear it start to tin can when
the fuel was gone and pump was sucking air and you could switch tanks
and never miss a beat.
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