While the is no substitute for seeing the car in the metal, the car does present well in the photos. The lines and gaps appear all straight and true, and the little headlight notches are in their place. There are a number of detail items on the engine (some of the clamps, the firewall pad, etc.) that are not original, but still fairly tidy. From what I understand on the early cars, the firewall pad material was quite fragile, so a replacement could be a reasonable maintenance item. I would say that is worth a direct look, or perhaps getting someone on the forum that is in that area to take a next look. Some further looks at the trunk, top well, and undersides.
FYI, there was no such thing as factory air conditioning, these were all added after the fact.
Jonny B
1967 250SL Auto