Originally Posted by DZJim
Here's one https://www.caswellplating.com/black-oxide-kits.html

https://www.youtube.com/watch?v=GwC9-dx9XLo




I have the Caswell kit and have used for many fasteners on my 70 Charger. Highly recommended.

70 Road Runner 383-4 4 speed FJ5 & black guts
70 Charger R/T 440-4 4 speed FJ5 & white guts