Rolling road AKA Dyno
Here's a thought I was thinking of.
So the one popular request I've have seen is "Can we drive our cars" and this has been answered several times but I wanted to put this idea forward
As a bit of fun or novelty, would it be possible in car designer when you get to the "testing" section to have a dyno/rolling road option?
As in, we can control the car but not actually drive it as such.
So the mechanism I was thinking to accomplish this was to use the throttle leaver in the engine designer as the "throttle" and have the car appear on a dyno and we can control the throttle and clip a tab "Shift up" to go up a gear and "Down Shift" to down shift.
As added option the power/torque graph appear so we can see the stats real time?
What would it add to the game? Well it would fill the void of "driving the car" if we could have some control of it. As in rotating wheels on the dyno and the slider to pull back the layers of the car so we can see the engine under the hood working hard

I just want to know, how hard would this be? To import the control details from engine designer to car designer as a testing option and well having a dyno option?
THIS would be an amazing feature.
So what are your thoughts?