what did an 86 dually have in it originally?

It is nearly impossible to tell with WELLCRAFT what origanally came in them for a tank. They would flip flop from year to year and sometimes change mid year. Just make sure somebody didn't put a fiberglass tank in it. Most of the poly tanks are good for ethano. One thing is for certain about 86, the fuel filler hoses were NOT ethanol compliant and will break down rapidly. If they haven't been changed they will need to be as well as the main fuel feed line.
 
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