I have changed many newer (1980 and 1995) cars over to 134 and as far as I remember all of them worked fine. I changed my 86 Aries K- car I used to have and I did not do much to it to change it over. At first they said you had to change a lot and now today you can just empty the R12 and pull the system down and add the right oil and then add the 134. That's about all the kits give you today. Heck when they first started to change some we got a 5 page manual on all the things they said to change including the compressor and drier or suction accumulator. I have used the kits of today and changed no hard parts at all and had the systems work fine. Course I have not don't any 60's or 70's cars that used the EPR valve and V comp. One thing I also notice is the 134 will get pretty cold but it usually takes longer to get real cold the the R12 system did. Ron