Dash removed, what to replace

[Raith]

Hi, im currently in the process of rebuilding/restoring my Z. Its a 91 twin turbo. I got the dash removed to get to the wiring harness and clean everything up and since im already in there im gonna be replacing the heater core and blower motor. My question is there anything else i should replace? The car is almost 30 years old, is there anything else thats a common failure point thats better to get to now? I just dont want something i missed to go out on me once i have everything back together and i have to pull the dash again.

[itsa300zx]

AC expansion valve and blend door gears for the vents, not sure if they are still available though.
There are some online sites for 3D prints for the gears. https://www.thingiverse.com/thing:3628939