There are already a few 1:5 onroad car conversions in Germany. Like for example this one here:
Evo 04. This one uses a 3040/12 (875kv) motor paired with a 32.170 Schulze on 8s2p Lipo (12000mAh) -> around 26000rpm. You can find a few videos on
youtube and
myvideo. I also saw a few conversions with Lehner 2250 or 2280 motors. If you compare those motors wheightwise with Neu Motors you should have a good match for your car. An MGM 12545-3 ESC should also do the trick. Good luck with your project.