<VV> new subject? A/C questions

[N2VZD at aol.com]

has anyone converted an early a/c system to R134a? is it worth the  hassle?  
do i need to reseal the compressor?  i want to keep it as  stock as possible. 
i can get some r12 if needed from my old business.. now i am  sorry i sold all 
of mine.  the only leak i found so far on it is an o ring  on the back of the 
compressor. i will repair that and try again with the vacuum.  then i plan on 
a new filter / dryer then reload.
it has been 16 years since i have worked on any a/c stuff so i better study  
it before i get too far into it. i do still have tools / gauges to work on the 
 old stuff.
regards, tim colson
**************Get the Moviefone Toolbar. Showtimes, theaters, movie news & 
more!(http://pr.atwola.com/promoclk/100000075x1212774565x1200812037/aol?redir=htt
p://toolbar.aol.com/moviefone/download.html?ncid=emlcntusdown00000001)