Rob, I'm not sure about the lines but I just had my A/C fixed by a tech at a shop that I trust. When I got the car I was told that it had been converted. The tech that worked on my car told me that the car was converted to R134 but the POA valve and expansion valve were not. The system had Freon but the low side pressure was higher than the high side pressure so that is why my compressor wouldn't cycle. We ended up ordering a POA valve that looks like the old style(R134 compatible) and a new expansion valve and that fixed the system. The valve was about 250.00 but it looks and works like new. I hope that helps, good luck with the project.