I have been working on a '57 6400 for the last 5 years (that makes it a hangar queen, right?) Anyhow the truck is almost ready to roll, except...the previous owner had pulled the stock 6 cyl. out and put in a '75 350 w/4 bbl q-jet. Runs sweet, but all the vacuum lines were jury-rigged. Needless to say, nothing work right. Truck has a vac. operated 2-spd rear end and a hy-vac brake boost system. I have replaced all the rotten hoses, but cannot figure out where the last 4 lines need to go, especially the hookup from the hy-vac to manifold via some valves mounted on the firewall, and also the rear end selector to manifold. I have a factory manual, but it doesn't have any vacuum line diagrams. Can anyone out there tell me where to find a diagram. :confused:
Thanks,
Carl
