Hold up Larry! You don't need to remove the compressor to do this job. All you need to do is loosen it. There are three bolts on the back of the compressor; two most easily accessible from the top, and the third (closest to the block), easily accessible from lying underneath the car. A tool that makes loosening and tightening these bolts a breeze is a 3/8 ratchet with a hinge on it (sold at sears). The one bolt that the tensioner pulls on doesn't really hold the compressor tight, so don't crank down on it.
'84 300D, 166k