I just finished a few months ago putting in a Vintage Air Gen II Compac system in my goon. The Compac system fits and is hardly any bigger than the Mini system and has a little more capacity. I used the stock KA compressor. The heater works really well, the A/C does okay in the Louisiana heat, but I think you are really limited by the condenser size. You can see in the pic below where I mounted the controls in the stock location. Also, the KA compressor interferes with where a KA sway bar would normally reside. I had to make spacers to drop the bar 1" to clear. It is hard to see anything in the picture, but I can take more if you want.