Compressor has been replaced with a remanufactured fourseasons one....Nobody ever stamped it, but it was replaced between 1999-2003
The clutch definitely is not cycling...I would guess with A/C on I lose about 20% of power, so its always obvious when it is on or off.
Don't have my gauges with me since I moved here, but will purchase some soon online since you can't find R12 anywhere local.
With the system completely evacuated, I put in 3x12oz cans...so 36oz. 36oz = 2.25lbs of r12.
I put the correct 90cm^3 of oil as stated in the manual.
I will check the site glass later today and see.