Has anyone converted r12 to 134 on there fc? If so is it a pain in the ***, should I take it somewhere, what do I need?

 

I'm about to do just that, (I decompressed my AC when I swapped in the turbo motor)...You'll prob want to take it to a shop. They'll be able to (legally) get rid of the R12 for you, blow out the system real good, and you know the job'll git done right(Warranty )
....It's usually less than $100 to change it over (I found a guy here in Austin that'll do it for $20)