93 taurus A/C compresser change

i got a blown a/c compressor on my 93 taurus, 3.0.... anyone ever change out the compressor?? the haynes book says you have to remove the p/s pump to get it out.. the helm shop manual did not say anything about removing the compressor(or i missed it when reading the book).. they did have the compressor in a seperate section showing you how to bench check the compressor but thats about all.... any help from someone who did it would be appreciated.. also its R-12 and when i have it apart i was thinking of changing over to R-143A, do i get a new R-134 compressor and the accumulator for R-134?? will they fit the connections on the tubing?? and how do i get rid of the old oil out of the system when apart? like the evaporator and the condensor???? what type of flush to use???? the kits for retrofitting the systems from R-12 to R134 dont have too much in them and on one web site from a manufacturer of one retrofit kit it seems that they dont even have any thing to change the oil and make no mention of the oil in the kit.... the instruction kit that you can download from their site does not go into that... cant be a very good retrofit kit??? thanks for any suggestions.....

You can buy a reman compressor than has the green 134 seals in it. Changing the accumulator would be a good idea too. All the o rings need to be the green R134 ones. Since most of the oil is in the compressor and accumulator, if you change both you got rid of most of it. You just need to use the oil that is mineral oil compatible (for the residue still in there) and put the requires amount in the compressor and accumulator. Your looking at a fair amount of money in parts. accumulator.

Pulling the PS pump will make your life a lot easier. Those bolts on the compressor are long. Taking the radiator fan shroud off will buy you some more space too. You want to spray degreaser on all the compression connectors and clean them off well before your start the changeover.

Make sure its pumped down for a long time and check that it holds vacuum before you add any refrigerant. Harbor freight has 134 gauge sets on sale not for $50.

Bob