I had A/C in mine when I first did the swap, Used the whole KA system bolting it to the SR bracket (used 3 out of 4 bolts)
Had the Expansion valve stick open not allowing it to cool, Thought freon was low along with a bad A/C pressure gauge, over charged the system popping the relief valve on the compressor. some A/C shop wanted like $500 to repair it, said fuck it and pulled it out.
Probably gonna put everything back in later on though.