Quote:
Originally Posted by Rich 5150 69
If your not running a vented cap you`ll need to put a pigtail vent in the tank.. there are two trains of thought on a return line, stock mechanical pump you don`t need a return line,( although GM used a return lines on the `69 camaros with stock pumps ) electric pump you should run a return line, 3/8 or larger to the carb and 5/16 back to the tank and return needs to run almost to the bottom of the tank to eliminate vapors, this prevents the electric pump from deadheading the fuel pressure and creating excessive heat and causing the pump to shut down, (thermal overload protection ).
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I am running a manual pump, so I won't need a return. However, what we are confussed about (and feeling stupid) is what lines hook to what ports on the tank. two of the ports we beleive are for returns/vents because they don't go down. However, the one nipple off the tank bends down a little, but it doesnt look like it goes all the way to the bottom. Sorry for the basic questions, I am just tryin to weed through this. THanks for the reply!