Which fuel pump?
 

What size elec fuel pump (external) do I need to run an 89 5.0L EFI in my '69? Just for cruizin, no racing. I was told some models of F-150 use external pumps that will do it? Thanks

Walbro GSL-392 just incase you want to add more power later. I'm not a big fan of stock pumps because they are usally under rated to begin with. Good luck thumb:

The F 150 external pumps are pretty good flow, very good quality, and I believe they are around 155 L/hr, and you can run two inline together, people have done that before.

Walbro makes some nice external pumps too, and like mentioned you could buy one, and it will likely fuel more HP than you will care to make.