Hy hoggyrubber, the 1/4" line should provide plenty of fuel, unless you're going to do full power pulls on an engine dyno. It should be just fine for breakin purposes or moving the truck around. As to the "white slime", I have no clue, but I do know that I don't want any of that inside my fuel system. You can try flushing the tank with various solvents, or you could just throw it away and start with something clean, good luck.
