A/C question

From my understanding, if your current system is in good working order, the only thing you have to do is get the kit, which is the R134 fittings, hoses and a certian oil, clean out the old r12, put in new parts, and fill it up. I'll double check, my father is the mechanic of the family with just about every ASE certification for vehicles, performance cars, classics and hybrids. From what I gathered, thats all he changed on my '93. I've read that the accumulator has to be 134 compliant, so check to see if it is XH7 or XH9. The car I drive was converted before it was mine, some 7 years ago when I was like 11, but none the less, this is one of those family drove the 2.3 to the ground and back kind of things going on. Google came up with this:
http://www.dmcnews.com/Techsection/r134.html
it sounds close to what I was told, so that could be a good guide to go by.

you have to get rid of the all the r12 out of the system, but once that it done you pretty much just drop n the 134. people say that the lines and accumulator should be 134 compliant, but i didnt change a thing, and it keeps me cool and hasent really caused any issues. When i bought the kit it was like $20, but in the last few years R134 prices have gone way up, so who knows what they cost now. basically though you need the fittings, Oil charge, and the r134.

Dr.