1967 Dart fuel tank

Here is the gas that came out of the second tank.

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Another friend had a very clean tank he pulled from a car that he is building for the 24 hours of LeMons!
I blew out the fuel line, installed the clean tank and put 2 gallons in. Fuel is clean and the car runs great....for a total of $20!

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U running ethanol type gas / Could be that its drawing water , metal tanks now dont have lead in their metal , and will rust if using ethanol fuel , unless its coated w/ something else inside.