My buddy just had his 72 GP done at the local Kwik Kar service place in our neighborhood. He has R12, they charged with R12 and replaced his super heat switch, cost him around $350. They use 4 cans I think.
Had mine evacuated and charged with 134 for around $150.00 at the same place. I had mine converted to 134 last year, this winter we put a cam in, had to drain it to remove the condenser, then I had them recharge.
__________________
|