Ok,

Everything's working fine but I'm not sure about how much freon and oil to add:

0. Condensor, Receiver Dryer and Pressure switches changed. Compressor not disturbed.
1. System Vaccuumed to -30 in
2. 4oz (2oz * 2) PAG oil added
3. 13oz * 3 = 39 oz R-134 added = 2.43 lbs which is 80% of the original 3.0 lbs of R12.

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Does this sound right? Do I need more oil?

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1) 84 300SD 285K+ Miles (Ver Calif)
2) 84 300SD 175K+ Miles (Ver Federal)