Restore factory ac or go aftermarket

Hi,

My 69 Barracuda is getting the original factory system. I have all the pieces and like the look of keeping things original.

In your case where most of the under hood components are missing, you do have some options. I would vote for keeping the original evaporator case, you know it fits and there would be no fooling around getting something else to fit in there. Also, I say this because the original factory systems were much higher quality than any after market stuff today. The factory systems added $400 to the cost of the car, over 10% of the new car cost of an A body. For this money back then Chrysler gave you a really high quality system, copper and brass evaporators and perhaps one of the best automotive A/C compressors ever built.
None of the after market stuff today comes close to the quality level of the original components. The original system in my 71 Charger works just fine.

I would have no concerns about rebuilding the original evaporator box with a DMT seal kit and reusing the evaporator core as long as it is not physically damaged. Under the hood you could look into a firewall forward kit with a newer compressor and parallel flow condenser.
With a little careful shopping and scrounging you could save yourself some dollars over a kit if you plan out the under hood system yourself, using either newer or original components.

I see someone offered you an original RV compressor and brackets. I would not overlook that offer as shaft seals and gaskets are readily available and that compressor is quite easy to service.

Feel free to PM me if you have questions. I've been working on these original systems for over 40 years.