Cool mod!
Some suggestions I think would be cool is maybe having an old brick laptop to tune the car as an alternative to the info panel, I just like looking at the stock gauges. Maybe something like an OBD scanner for diagnostics too. And the AWD and 6 gears is nice but it would be fun to have parts like an AWD conversion kit to install before you're able to use either.
I haven't taken a look at it again.
Having a computer/tool to program might be an option but I would need to add stuff like injectors instead of the carbs.
(From a pure programming stand point this is possible and I already know where I would need to start)
3D modeling on the other hand might turn out to be a bit more time consuming.