So I've never replaced head gaskets before but I decided I'd like to try and do it myself on my '86 Cutlass Supreme with an olds 307. I'm still disassembling everything so that I can start breaking down the actual engine and I've come across a dilemma. The A/C compressor's bracket is attached to the passenger side head. I would rather not remove the compressor so I don't risk breaking any of the hard lines or having to get the lines refilled so I'm wondering if it's possible to remove the heads without removing the compressor. Can I remove the bracket and hold the compressor in place with the lines still attached? Also if I do have to remove the compressor how do you evacuate the lines? I thought that it was dangerous to just remove a line while it was still pressurized. Any info on what I need to do and how to do it would be greatly appreciated