all vacuum stuff is reused. Front waterneck. EGR. Alternator maybe. Leave the cruise dangling, and leave the AC lines intact. Rob the AC mounting bracket. Switch the powersteering hose and fuel filter with the engine out. You'll reuse everything from the cat back. I needed my O2 sensor. Keep your stock harness for reuse.
Dude, keep everything on hand, until you are quite satisfied with the result. You might want to rob a hose, smash a spark plug wire, etc. Throw out the extras afterward.