My retrofit job (on '85 240 DL on which the compressor died) is almost done. I bought the Volvo R134 conversion kit from FCP Groton, and a DKS 15BH compressor from Air Parts in Ocala. All the new stuff is in place except the compressor (it is a near match of the old one, except the Zexel nameplate instead of Borg Warner -- is the Zexel a rebuilt?).

Jon at Air Parts said that it's set to go with oil & all for 134a, even though it still has the R-12 labeling. Guess I'm OK without changing the oil?
I was planning to have my local shop evacuate the system prior to a DYI recharging. Jon said to not have the compressor running when recharging -- sound right?
Also, I've got the apparently high side port next to the dryer (on the tee fitting that comes with the kit) -- can it be filled from there, or where? The compressor has the old style ports on the back, apparently functional.

Any guidance on how-to for an A/C rookie on the final steps would be appreciated.