Hi I have an '03 LQ4 out of a Yukon that had hydro boost, swapping the engine into my '74 Ford truck. There are 3 lines coming out of the pump, 2 are black and one is a silver removable line. Which is the high pressure and return line and can I cap off the third line? Thanks in advance

 

The silver removable line(actually they are all removable) is the pressure line. The other two are returns from the brake booster and steering box.

 

^^^ Yep, and if you want to cap one, cap the return fitting on the side of the pump and not the one in the back.

 

Awesome! Thanks for your help