After much ado about nothing, here's the final results:
Chassis: a variation off of the "Stinker" for both with side pans. Worked out fairly well. I soldered up roll bars as well.
Motors: Pirahna 21k
Wheels: CBB 15x10
Tires: PGT-22166FF
Paint: All Duplicolor Rattle Can
Decals: Polecat
Guide: Slotting +
Axles: Slotting +
These were lots of fun to build! Neither is remotely perfect. I attempted to use Bare Metal Foil one last time and had issues with adhesion again. I also just suck at it apparently. Either way, they look pretty good and slide nicely around the oval. Of course, I had to run them on the PDR and they look just perfect there as well.
I think I need a fleet of these!