Engine/Transmission (1998.5 - 2002) Which is the right lift pump

[DSiemens]

When installing a Comp and putting on a secondary pump which is the "right" one. Their are so many different part numbers in different posts that I don't want to get the wrong one.

 

[TomGolden]

I don't remember the part number for the one I have, I want to say something like Carter 4601?? Anyway, I have a Carter 7 PSI pusher pump mounted back as close to the tank as I can get it. In looks, it appears to be identical to the factory lift pump (on the outside at least).