More work on the C10. I replaced the LF wheel bearings. They looked a little burnt and felt a little rough. Right ones are worse. They're next.
I replaced the LF brake hose because it appeared to be holding pressure to the brake. Well, there was still some residual pressure. I thought maybe defective hose (it happens). After waayyy too much time trying to decide that the master cylinder actually was defying physical laws, I stuck a known good one on there I had laying around.

Son of a pink bottomed monkey.
Defective master cylinder in a way i've never seen.
20,000 brake inspections and this is the first one I found holding pressure like this.
(no residual valve, push-rod adjustment fine... for those in the know)

So there's still a few hours of light. Enough time to tackle the RF bearings, brake hose, and RF upper ball joint. I took pics of the ball joint. after jump.