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Old 11-03-2025, 06:00 PM   #1
Dillon Rock
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Join Date: Dec 2012
Location: Bangor, Michigan
Posts: 378
Triple fuel tank on a 1980 C30 dually

Okay, been kicking the thought around on how to go about setting up a triple tank setup. My dually has 2 20 gallon tanks and I've wondered if anyone has had or committed to making a three tank setup i.e. a suburban or blazer tank behind the axle? If so, I would like to know details and how to go about wiring in the switch and routing to gauge plus how you set up the fuel tank plumbing. I have to replace my passenger tank due to a rust hole so both will get swapped (joys of owning/working on/driving 45 year old equipment or better). Mainly the thought is for long haul (454 gets 8mpg or so with the manual) and just long distance in general.
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