Had questions on removing factory air

Hi Stoney, welcome.
Don't disconnect any hoses if you are unsure if there is refrigerant in the system! Regardless of what's legal, if you get a blast of refrigerant in the face or on bare skin, you could get quite a burn.

An easy way to check is to unscrew the cap on a valve and depress the valve core with a screwdriver. Press and release very quickly. If you get a small discharge, you'll have pressure, and legally you must recover the refrigerant. If you plan to get the A/C working again, consider leaving it sealed to possibly save effort and expense.

If there's no pressure, the system has leaked out, and you can disassemble as you like. But be careful cracking open that first hose, just in case.

You should use a service manual. You can get one for 1973 free from myMopar.com . It will be close, but could have differences from your '74. CD-ROM service manuals are available, find with your search engine.

Please report back on this thread and post pictures!
:thumbsup: