1999 328ic e36 AC compressor replacement

[hlizaso1]

Hello,
I'm planning to replace my AC compressor and I have a few questions:
1) what size recovery tank do I need 30 or 50 lbs?
2) would replacing the clutch make sense as well or is that part of the AC compressor assembly?
3) anything else I need to replace while doing this AC project, e.g., condenser, etc?
4) Do I use the recovered refrigerant to recharge the AC system?
Thanks.