As quoted in another thread this is the breakdown of the AC parts for the SHO. To my knowledge only available from Ford. You might just need a recharge, or have the gap reset on the clutch.
From Mr. Anonymous:
For future reference for anybody looking, here is a list of the A/C parts for the V8 SHO:
Compressor (Compressor ONLY, no clutch/pulley/coil): YC-187 or F6DZ-19703-CB, List $459.98
Clutch/Pulley/Coil Kit (Clutch Hub and Pulley NOT available separately): YB-539 or F6DZ-19D786-AB, List $343.81
Coil Only: YB-540 or F6DZ-19D798-AA, List $146.88
Accumulator and Hose: YF-2766 or F7DZ-19C836-EA, List $160.28
Liquid Line (Complete Assy-Condenser to Evaporator): YF-2655 or F8DZ-19835-BB, List $108.66
Manifold and Tube Assy: 1996 Models: YF-2217 or F6DZ-19D734-B, List $183.48 1997-1999 Models: YF-2502 or F8DZ-19D734-CA, List $189.78
The first part number for each is the Motorcraft A/C Parts part number, and the second number is the Ford Service Parts part number. All of the parts listed are currently still available. The pulley bearing is not available separately from Ford.
For those interested, we always have a few good used compressors on hand for much, much, much less than a new one would cost. <-= (Northeastsho)