I know there are some A/C techs on this forum so I'm gonna ask.

I'm swapping the A/C from a rust-bucket '89 4runner to my '84 pickup. The donor system had no pressure in it so I think I should assume that the parts I'm going to reuse, like the evap coil, need to be flushed. If I understand this right the expansion valve should not be flushed and should be replaced with new. I'll also replace the condenser, the drier/receiver and all the hoses/lines with new parts. What about the compressor? The donor vehicle had 160k miles on it. Is it possible to clean it out so I don't put any accumulated crud into my new expansion valve and other new parts? If so what kind and how much oil should go back in after? Or should I bite the bullet and get a new compressor as well? -- Matt