The real issue with the poor AC performance was lack of condenser area. More is better.
The only original parts of my AC is the front and rear condensers. Well, of course the brackets and vents are original.
I test my AC in HOT conditions, as much of the southern US is HOT.
Here at the International Space hall of fame, my car sat for an hour in full sun. As always, I parked at the far end of the lot all by myself. It was 107 that day. I hopped into a 130 degree interior. Fired up the engine and went to full cold, hurricane blower. Withing 10 minutes I was comfortable, and in 30 minutes I had to turn the temp up and the fan speed down.
It cooled off 2 whole degrees in Roswell that day.
I installed his system back in 2008, and 74,000 miles ago and my only regret was I did not do it sooner.