Alan, did you get this figured out? I am rebuilding the engine in my 69 and I thought replacing the AC Compressor would be a simple thing to do. Remember one of the last lines from My Cousin Vinny where Marissa Tomei says "Oh my God, what a F--kin nightmare!"
Well, that's how I felt. I think my system was converted to R134 some time ago. Long story short, I am changing the muffler to the compressor for cosmetic reasons, but I have to change the drier or the compressor will have no warranty. R12 is more forgiving and hose clamps can be used, but I believe it is way mroe expensive than R134 and I don't know if it can even be bought in stupid whacko California anymore. (guess where I live?)
R134 is cheaper, but way smaller molecularity, so all of the fittings have to be threaded with 0-rings. I was told the compressor should be drained of all oil because you can't trust how much is in it (especially true if buying a new one). And the only way to do that is with it off the car, then refill before installing on the car because the orifice to fill is so small. Anyway, back to my Marissa Tomei comment. I was just wondering if you got it figured out. I am figuring after buying a compressor, muffler and a drier, THEN taking to a shop to check out and refill with refrigerant, I am looking at $1,000.
Whoopee! But it's there, so it may as well work, right?
Torque (tork), n: 1. The tendency of a force to rotate the body to which it is applied. 2. See also: GTO