The compressor is a little bit loud... and the control system is fairly primitive - I did hear that Vintage Auto Air uses electronic controls, even for a servo for the flow to the heater core...
1968 Firebird 400 Convertible Original: Engine, Intake manifold, Heads, Body, Stereo, 3.08. THM400. Engine rebuilt by Ken Keefer early 2012. New: Holley 4bbl 670 HP, hidden iPod setup, RobbMC mini starter, A/C, front disc brakes