it that your brake set up just behind the cab?
If your referring to the hydrovac in my photobucket pix, that is the old one. I've since replaced it with a rebuilt unit from Alretta in Mass. Got most all my brake parts from them. the master, hydrovac, wheel cylinders.
I had the shoes relined locally by a guy still in business...been doing them for years. Cherish the old school guys cuz they are few and far between these days.
