Well it's been a long haul but my a/c is finally working. I have a polished Sanden 508 compressor for R12. I have a new expansion valve, drier, and hoses too. They said it would never work like I'm running it but, it does. I'm running 134A in a R12 compressor with mineral oil. It works for me. See pics of the compressor on my motor here..........
http://72ss454elcamino.com/completed__project_pics.htm

COOL! Literally