Great job on the core support repair! You look to be very experienced.
1) Why are you removing the A/C?
2) What would keep you from removing the rest of the front-clip? I just went through a restoration of the engine compartment of my 1967 Impala SS. I removed EVERYTHING from the firewall forward. With the sheet metal removed, cleaning, painting and working on sub-assemblies was so much easier
For ordering parts and to save on shipping, you might try some of the suppliers in California:
I think you may be able to order Eastwood products from these shops.
If you go look at the "Welcome" postings, I got a picture of the Nova there. The wife and I did all the work except the finish bodywork and painting.
To answer your first question:
The a/c condenser was removed many, many years ago. So the system was open to the atmosphere. 5+ years ago I removed the compressor and evap. These items have been in storage in a humid environment. Then on top of it, converting the car to R-134a from R-12. So currently its cost prohibitive. All of the parts will be kept with the car and some day the S-I-L may have it re-installed. But everything would have to be replaced. My best guess would be over $1000. But the option will always be there.
Question #2: I didn't want to lose the alignment of the front fenders. The car was hastily re-assembled with minimal bolts and not automotive hardware at that. So keeping what I have is important. I will probably remove them one at a time to remove the surface rust on the inside that I recently found. While redoing my Nova the past few years, I learned trying to re-align old sheet metal that has been off the car for a period of time is a pain.
The plan is...Once I get the radiator support finished and the forward portion of the framed cleaned up and painted, re-install the support and then remove the inner fender wells, just so I can keep the alignment. I may at that time remove one fender at a time, reworking one side at a time.
Hope this makes sense. Plus my room in the garage is limited to where the car is sitting. The other half is storage, Which is a longer story.
Thanks for the links, I use C.I. all the time. The other 2 I'll look at.