AC recharge

[bertrenolds5]

I know there are a few people who have converted their 1g to 134a but I guess it would be a good idea to vacuum the R12 out so they can recycle it and resell it and then mix oil with the 134a and I should be fine. I am going to talk to my mechanic friend about a hose with a guage. When they vacuum the system can they check pressure?

So anyone have any suggestions on where to get the r12 sucked out at?