Why do you want to convert it? If it ain't broke don't fix it!
Mine one the other hand was broke, so I bought the conversion kit, expelled the
remaining r-12 from the line, installed the spuds, installed the two part stop
leak and two cans of 134a, and its running like a champ all for $30 bucks.
Don't know if I would have been so gutsy if it were working, but "Hey" can
always go pay the big bucks, right?
Worked for me, don't know if its right for you.