Sorry for the late response, I've been working on making hand made leather hats.
I used both glow plug wires, temp send wire, alternator wire, starter wire. Any wire I didn't need I just cut them out.
What, if any, are the differences in the 85 C10 model hydroboost setup compared to the 2002 Silverado year? I'm thinking about putting the hydroboost on the 73 C10 I did the LS Swap in.