I hope you are back in action soon too. This is an interesting thread, as I have never owned a 66-68 Chrysler or Imperial.
How many miles on your LeBaron?
One issue that probably will not be very resolveable is the Autotemp I system. Parts for those are long gone, and they didn't work for long even when new. You might want to be thinking of doing some modifications to make it a manual operating system (bypass the Autotemp controls). But even that isn't so clear how to do. Those were the first of the first generation Autotemp units, so I am sure there were still many bugs in the design at that point. My 69 Le Baron 2 door has that system too, so I am thinking of taking out the dash and substituting a manual system complete from another donor car. The dash assemblies in the 67 - 68 cars in particular was pretty cramped, and with the number of accessories your car has, it will be a challenge to to work on it in the car in any case I would expect.
At least you have it running and driving now, if only a little. So you are on your way. Keep us informed. Good luck.