I wish I knew beforehand that Mr-02 can't run AWD bodies
I'm posting this question so my answer in a PM can be shared publicly
Answer
In short, the only thing that makes an AWD body an AWD body is the wheels it comes with (keyed for AWD shafts instead of bearings). You can mount an AWD body on an mr-03 narrow or mr-015 chassis because they are narrow. Most AWD won't fit the mr-02 due to being too narrow but that is the ONLY reason. So for example, the Audi r8 is an AWD body but people race it ALL the time in 2wd just by swapping the wheels.
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