R134 is refrigerent your going to use .. compressor choice will dictate oil used , ester sometimes used in conversions from R12 to R134,,, mostly in the 90's early on when conversions were first started, later on PAG was fine in the conversions ,,PAG 46 most common PAG 100 as well ,used mostly in mid 90s ,and early 2000 fords ,,,
NJbronk picture is of a Sanden SD709{?} compressor , but china NEW knock off ..pretty common oe applictions {multible car manufatures used them} as well in alot of the kits offered today,mostly for mounting options ability and line hook up ease,, you can still get a new sanden compressor or remanufactured , but would cost more then the one pictured above,
brackets and pulleys will need to be worked out,
could also use a ford york style compressor most easily attainable would be a new overseas repop,,but WHY,,
another option ford compressor FX15 ..BUT mounting.. , switching to explorer front dress would simplify sort of......could add more but .