I did the Griffith's kit with compressor for an 88, some time last November. Work done by RMG. I am in the San Jose to Sunnyvale area most of the time.
I suppose you could get away with just the one without compressor, but I wanted it over and done with and not leave out any variables. Plus I had an extra $400 burning a hole in my pocket. J/K.
Today it is 90 degrees out, and my thermostat is still not full blast. It is probably below halfway and is still blowing cold. They say tomorrow is worse, up to 100, maybe I'll take it out and let you know.