From my understanding, you actually need the valve body to make the conversion, and may be difficult to find. My Daytona came with a 4-speed, so I don't have that problem.

As for the A/C, I don't know how you want to go about this. The factory A/C system and it's individual parts can be hard to find. I've seen some guys buy complete (parts) cars to pirate a complete system. And the Climatizer heater system doesn't lend itself to converting to newer aftermarket stuff from places like Vintage Air.

If you find an aftermarket under-dash unit similar to the factory stuff, make sure it's R-134a compatible. R12 is way to expensive if there is a need to charge or recharge the system.

The radical way to go would using a Vintage Air or Hot Rod Air system. Unfortunately you'd have to completely pull the OEM heating system, and the factory heater switches will just be taking up space.

Hmmm, Flint. Howdy neighbor!