The three port Chevy fuel pump was used on older model 350's to ensure that a constant supply of fuel went to the carb.
During idle less fuel is needed. During full throttle all the fuel you can get was needed. :drool: So the fuel pump actually pumps more fuel than is needed all the time. Thus the reason for the third port - a return line.
This kept the pump from pushing to much fuel / pressure to the carb while at idle. You can replace this with a 2 port fuel pump (NAPA should have the correct interchange numbers), and eliminate the return line at the pump.
I doubt that you'll ever get the 350 cranked up enough to starve it of fuel in a Jeep. Now if your building a rock bouncer?
That's a different story.[/QUOTE
thanks alot peanut butter, I did go with the two port from napa !
