Its a lot of work. I don't know about the wiring harness issues. I wouldn't be surprised if all that simply unplugs and plugs back in.

And if you are saying you are going to swap the older chrysler climate control for the later version, I would not. It is considered problematic.

The under dash stuff is not all of it. the piping under the hood is different too and the position of the ac compressor may be different as well. Sounds like something you want to consider carefully before embarking on it.

I would fix whatever is wrong with the system in the car you want to drive rather than swap it.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.