The HP line is the metal one that comes up to the pump, makes a 90-degree bend, and enters the pump. I think it comes in from the side, if I remember right. Also, it should be attached to the EVO sensor/actuator on an SC.
Also, if you buy from Harbor Freight, make sure you buy the PS pulley puller with installer tool. They sell the puller part by itself, but you need the whole kit.
You will definitely want to remove the upper IC tube and IC. The top tube is pretty easy. The bottom one is not. But if you have to remove the PS and alternator bracket, you can remove the upper bracket for the lower IC tube at the same time. It is buried back there and is a pain to remove. I just removed it and tossed it in a box. Between the studs at the plenum and IC and the lower tube support stud, I don't think the lower IC tube is going anywhere.
Before you mess with the alternator, unplug the negative battery cable and tuck it away. It is hooked more or less directly to the back of the alternator, so you could get a bad shock.
Oh, and try not to drop any little nuts behind the bracket during the reinstall. That was frustrating.