Before I joined the Navy I was an automotive service technician in
texas. I did A LOT of A/C work every summer and WILL NOT touch freeze
12. I will convert to 134A all day long but some cars it just wont work.
My 85 GL is going to get recharged with R12 after I replace the
coimpressor drier and expansion valve and replace every seall in the
system.

Now the thing about Freeze 12 is it is PROPANE based. A news station
back home once serviced a car with freeze 12 and made a small leak in
the evaporator. They ran the car for 30 minutes or so all closed up and
had a mannequin inside with a cig and lighter. When the made the lighter
ignite the whole interior became a fire bomb and exploded.

Just something to think about. I smoke so no freeze 12 for me

Jonathan