Brakes

Took the old girl on 600 mile plus road trip this past weekend  to a statewide car event and she did fine except towards the end of the trip the brakes began to fade.  Brake fluid level is still ok and no noticeable noises so now I get to do a little troubleshooting.  Any suggestions on next steps?

Turns out that I had to rebuild master brake cylinder and booster (try finding a booster). Now having issues with passenger side front drum seizing up after an hour or so of driving. Time for Troubleshooting. Tips?

I converted my manual brakes to a later GM dual chamber unit with a small diameter booster to clear my clutch hydraulics so I can't comment too much there on stock stuff.

I think I do have a stock power brake booster and master in the shop. Not sure on condition

Have you put new brake hardware in yet? I've seen that happen from broken or worn out springs.

Also a good idea to go ahead and do new wheel cylinders.

The springs look ok but I agree that much of it is probably due for replacement.  The parts search is on.