Originally Posted by Diseasel300

38-41 is about as low as you'll ever see it go. There's a thermistor next to the evaporator coil that will kick off the compressor at 3-5˚C (37-42˚F) to keep it from growing ice. Once my SD has pulled the cabin down, it stays 42-44˚ on medium fans speeds and below.

The earlier cars will NOT work that well once converted since they had the old-school single-circuit fat-tube style condensers and woeful Delco R4 or mediocre Harrison A6 compressor. The updated '86-91 cars will though due to the upgraded condenser design and Denso compressor. The '88-91 cars got the dual-fan auxiliary fan setup (vs single 16" fan for '86-88, or single 12" for '81-85) that really helps at idle speeds and city traffic too.