AMC-ish A/C question

Working on a front end wrecked 93 Cherokee XJ (not technically AMC but designed by AMC) that still has the original R-12 system.  The condenser was bent in the wreck but did not leak out refrigerant.  I do not have access to an a/c recovery machine and was looking for a way to get the condenser out of the way to do front end work.  This system has compressor isolation valves like many of the early AMC systems did.  It also has this fitting (see image) on the receiver drier that looks very familiar to the one on my 69 Javelin drier.  Based on what 401Matadorcoupe told me when asking about the fitting was that this was a means of splitting the evaporator, expansion valve and hoses from the condenser and drier assembly and that during production the evaporator could be "overcharged" with refrigerant and once connected to the fitting on the drier it would distribute the refrigerant throughout the whole system.  So my questions are 1) is this fitting on the 93 Cherokee drier the same thing as the earlier AMC isolation fittings and 2) would this be able to once again split this system up and I could isolate the condenser, drier and discharge hose from the rest of the system.