pf,
Thank you! I am going to take a copy of your instructions to know that I get it right the next time I have the truck running. I pulled out the seat for repair yesterday, so it will be a while before I get back to starting the truck. Before this, I was driving it around to take off racks and old wood (that came off the racks) piled on the bed. After fixing the vacuum leaks, the engine ran much better and the brakes seemed to hold while stopped. I have already replaced the check valves (they are plastic and I broke one taking it off). (My 66 GMC has two check valves for separate lines to the hydrovac and, if I remember correctly, to the two-speed rear end.)
