does anybody know anything about a MARK IV air cioditioner. as long as i can remember the truck has had it in there. it was mounted under the center of the dash with hoses that ran out thru the firewall to the compressor. was this a factory opption, or was it just something added by a local mechanic? if it matters my truck has the thriftmaster 235 engine in it. also can you rebuild one of these A/C units and is it worth it?
