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19 As stated earlier, the drain plug, situated at the top of the tank on the Ranchero, will make the perfect return line port for the EFI fuel system. We cleaned up the pipe plug fitting, and then drilled out the center of the fitting on a drill press to fit the bundy tube fitting we sourced from Ron Morris Performance. The return line fitting was temporarily installed in the tank and the bundy tube clocked where the line would route the best and the fitting marked. The assembly was then removed and two-part epoxy applied to lock the position of the fitting and to seal it.