Sure, I have some advice: read the wiring diagrams for the old truck and the donor vehicle
Your 82 would probably had a 10SI alternator like I was running in my Camaro. It used three wires. One wire bolt down. This wire goes straight to the battery (probably a fusible link in it somewhere). The other two wires went into a connector--one of those wires was 12V battery power taken from the fuse box, and the other was the idiot light. I don't know what a 2000 truck alternator wiring diagram looks like. The 2000 truck will have a bolt down connector on the back, and you'll connect that to the same wire that runs to the battery than your old alternator had bolted down. For the other wire on the 2000 alternator, I'm not 100% sure what that is... On F-bodies alternators it goes to the PCM, but I think I remember reading that trucks are different. There's a good chance that it goes to the idiot light, but I'm not 100% certain.