I was looking at my brake lines while I was using a shop's pit. Their definitely a bit rusty.

I'm going to take a closer look in the near future and trace the whole set of lines and take some better pictures.

https://photos.app.goo.gl/eydlMCr8QhZaZMRH3

How bad do those look?, I've seen much worse. I'm going to spray them down with some oil (probably fluid film for now).

How hard is it to run new brake lines to the rear of the vehicle? Do you need to drop the fuel tank / raise the cab or the bed?

I don't really have the tools or space to accomplish that, once I've crawled under and traced the lines fully and I've gotten a handle on how rusty they are I'll have to make a call.

The rear lines should have been bled / flushed a couple years back. The front lines were bled flushed this past spring.

Thanks!