Your project looks cool, congratz!
I was wondering if I could ask for help; I've build your cars on top of the draft of this demo project, I was looking into that too becouse wanted to make a prototype for this idea of a very basic "racing thing" to be moddable. To make this appealing I was thinking it may need the [url=
rendering feature[/url] of godot 3.
I've tried to strip said truck demo; keeping it as much simple possible I just exported the car, but it behave in really weird way, so I wasn't able to even get thing started (at programming I barley mange to get things done in 2D; 3D it's beyond my skills) this is what I did: GranModLibertyGT.tar.bz2(GT is for GodoT). Since you said you'll port your project in GD3, I was wondering if you could, well, maybe export just the basic vehicle (no IA, not camera... just the plain car with physics, engine and keys) so I could use it already. "