If you're running the factory V2 compressor, you'll want to do the oil level check in the FSM and maybe replace the shaft seal if there's a lot of miles on it. You'll need some AC 150 mineral oil or better yet Ester Oil, as it's compatible with residual R12 mineral oil AND 134a.
X2 on the reply above - you need the vacuum connection and the heater valve, which may be hard to find.
