Don'y you just love a midlife crisis,
You got yourself some work there, very rewarding when it works and very frustrating when they don't, which happens quite a lot with home built sims.
Unless FS2 supports something similar to AirManager your gonna be out of luck as there is no way to drive the gauges, which I assume will be on separate monitors. The choice of using servo gauges would seem even more remote. Eternal visuals will also need some thinking about.
Welcome to the home build world where is quite normal
you're right, I love it
I'm actually planing to save the original gauges and convert them with stepper motors or servos.
I'm sure by the time I'll get there, lots of things will be sorted by others.
Will start with the mechanical portion though.