Do not discharge your A/C, just loosen the compressor mounting bolts & lay it & the hoses carefully out of your way, just dont bend the hoses where they pinch. I removed the motor & trans in mine & never discharged the A/C system, I layed the entire system over the passenger fender (with lots of cardboard & fender covers) Some bungie cords are hlepful to keep the compressor in the temp location & you know it wont fall. The only thing tough on the WP is the fan, sometimes it can be a real b***h, Most of the chain parts stores will rent you the wrench to remove it.
JP02XLT