air conditioning

Hi all! I'm finally putting my cockpit and living space back together after a nearly 6-year-long frame-off restoration of the automotive bits of my 1973 GMC MotorHome. The Original HVAC System I started this summer with a bare firewall, ready for prep and paint. I dug my original HVAC box out...

Hi All. I posted this on GMCNet and here to get as much input as possible. The dash AC system in my rig was converted to R134 sometime in the past 5 years or so. The PO then replaced the R134 with Duracool (HC-12a). My AC still blows nice and cold, but there is a leak right under the front...