Had a very hard break pedal thought maybe it was the original booster so replaced it and the master cylinder. Not either one. Figured out I have a blocked line somewhere in the back. Probably in the short flex line that goes to the back breaks. Best place online to find a replacement?

 

How did you "figure out" the rear hose is bad? Did you verify that no fluid is passing through it? If that's really the problem, Raybestos or Wagner hoses are available anywhere, including RockAuto, NAPAOnline, and Amazon. Note that you might have better luck if you search for BRAKE parts.

 

Thanks. Yes, I bled the brakes and fluid came out on the front lines, but not past the flex line that goes to the dist box to the rear lines.

 

So you DO get fluid out the hard line that runs down the frame? It is possible for the rubber hose to go bad. The inner lining can separate and create a "check valve".