We recently received an e-mail from the proud owner of a 1963 Cadillac, with installed, under dash air conditioning manufactured by Classic Auto Air.  The compressor is disconnected, and the owner is curious about how much R134a is needed to re-charge the system.  Instruction manuals are included with each Classic Auto Air system shipped, but we get this question frequently enough so we are answering it here in our Tech Talk section. (more…)