<VV> AC questions

[aeroned at aol.com]

I want to get the AC serviced in my 66 Monza. There aren't too many places that will touch the R-12 systems anymore. A couple places still have the equipment but need me to provide the R-12. That's not too difficult to find.

So my first question: How much R12 do I need to completely refill the system?

There are a couple places that will convert the system over to 134.

My second question is how effective is the stock Corvair AC system with 134?

Thanks,
Ned