Agree tyl. I had my '83 converted to R134. It cools o.k if you start the ac before the car gets too hot in the interior. Takes a long time to catch up from hot. The conversion was done correctly replacing compressor, expansion valve, dryer, hoses and o-rings.

I am told that replacing the condenser with a good cross-flow version will fix it completely. Klima has one for $245. Thinking about it.