I have the ceramic coated ones on my 85 K-10. The coating is not the best. The headers themselves are not bad quality. I don't have the bars that run from the trans bell housing to the motor mounts. If you have those still on the truck, I'm not sure of the fit. Notice the frame butchery on the driver's side. It was done by a po.
Fwiw, the Hookers on my 76 are their ceramic coating, and looked like yours. They were on my buddies blazer first, and only a couple years old, blazer was a fair weather vehicle too. The ceramic coated hookers on my bosses challenger are the same way.
What is weird is when I sand blasted mine, the “rust” was in between the steel and a layer of the coating, not the steel itself. I cleaned them up and hit them with silver BBQ paint and it’s held up good so far.
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach