Very well done Challenger. Those old Otaki kits build up nicely as curbsides.
This is my all time favorite color combo. I once owned a '72 Charger in gold with a black vinyl roof.
That's some fine workmanship there. Right down to the accurately detailed trunk compartment.
Regarding dust, the Tamiya Model Cleaning Brush works very well for dust removal.
https://www.plazajapan.com/4950344062591/
Would this be at all close to what you are searching for?
http://www.b-n-lresins.com/shoppingopencart/Aftermarket-resin-cast-1-24-1-25-scale-model-engines-Ford-Diesel-Mopar-Oldsmobile-Toyota-Honda/Aftermarket-resin-cast-1-24-1-25-scale-hobby-model-Chevy-GMC-engine/Aftermarket-resin-cast-1-24-1-25-scale-model-model-Chevy-ASA-Racing-V6-engine
Steve, I'm unaware how you created the levers, and more specifically the handles.
Would you show us your method? I'm hoping to add levers to some columns going forward.