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the 2 main fuel lines running from the pump the selector switch. there is one line that is bigger then the other, i need to know and its my guess that the bigger line is the feeding line while the smaller line is ther return line??? is this correct
im disconnecting my 2 selector switches(im guessing that not wut stock truck have, i thought they have 1?) i have just found and have all 3 tanks out. right now im going to run 1 tank (the 3rd none stock tank) on my chassy cab and i need to know witch is the feeding line(i belive the fat line) and the return line(smaller line) so i dont make it backwords