orfice tube = $3
Accumulator= $30
Compressor = $100 (w/ trade in)
having cold A/C= PRICELESS
Dude, the conversion is only two pieces that you can get on ebay for $20 and just screw on the existing fittings, one high side, one low side (blue and red).
If you know someone with a vacuum and with manifold guages, be his best friend for a week or so. There are instructions all over the internet. You should just get them to evacuate the old freon from your system versus helping to deplete the ozone.
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