I had a friend sent his off to a company in 2002 and was charged $1200 plus shipping. He got it back and it leaked on the floor of his high dollar restoration. I did my own. It’s a 70 charger and it was complicated. It took me 40 hours. I changed the heater core and water valve. I had the evaporator tested. Mine works fine except for one vacuum pod that has some stress on the rubber diaphragm. Several of my parts boxes had the same bad pod. I may have to take another pod and shorten the rod to use it. The second box I did was faster, it only took me 32! They are not easy to do so be prepared to pay.