81Wagon,
Don't even consider messing with the internal setting on the TXvalve.... they are about $25 new.....and remember he is testing a different refrigerant right now....just get a new one...and be sure it is the one for R12..... it takes specialized equipment to properly reset it .... and you don't have it....
Keep reading the archives on AC info..... someone told all about the P flow retrofit and told exactly the sizes of the custom fittings he had made....they are there somewhere....may have been GregS...

DMorrison,
when you said " Evaporator was leaking which started all this. Had about 50% blockage of air flow on the evaporator.
" did you mean you had blockage on the condensor ? (the one at the front of the car )....

On your pressures..... You may need to wait until it is hotter to determine if you have installed the correct amount of refrigerant...pressures are closely related to load... so at 72 ambient those figures may be ok...or at least may not be able to spot a problem without higher outside temps (load)...