Thoughts about cost of putting this car back to original configuration? Especially if some of the removed parts are gone. Listing shows all the modifications done to this original drive train car. I get that you do what you want to what belongs to you, but it seems the owner would have been better served by purchasing a clone or other non original car.
https://bringatrailer.com/listing/1969-chevrolet-camaro-z-28-293/#comments
I saw the post as well. No idea why you buy a car restored to factory originality, for $165K, and then make significant modifications to it - looks like he spent north of $50K on the mods post purchase and then decide to sell it a year and a half later. Based on the posted pics of the removed parts, its not clear if they are correct.
Regarding restoring it back - really depends if any metal was cut (like in the firewall to accommodate the AM AC system). If the firewall was cut-up, will require a fair amount of Remove and Replace operations.
Either way, I suspect the car won't hit reserve pricing or what he paid for it as he's gonna take a big hit for modifying the car to the extent he did.
I was looking at the Barrett Jackson sale of the car in 2017, and saw that it still had what was probably the original radiator. This owner had it removed, and it is gone. Just makes me a bit sad.