Might want to check but I don't believe any aftermarket system uses outside air for cooling-heat. Only one or two offer a system to match up to existing dash vents and they start at $1,000. As far as temp goes, both R12 and R134 will blow at 40 degrees if charged and adjusted correctly. I would look into a rotary compressor verses the original stock POS. You would save significant HP and mpg which would pay for it's self quickly. My .02---Huck
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