(85 swb crew cab 1/2 ton on bags)i put new stock calipers and rotors on the front and ford 9 inch from 76 lincoln versilles in the rear(disk brakes with 5 on5 pattern ) and whn i hooked up the rear and tried to bleed everything the rear calipers will not lock up. i have a proportioning valve on the front cross member that all my lines go to and i was thinking of pluging off the lines to the rear and running a new rear brake line staight from the master cyl with an adjustible prop valve from summit. i think the prob is that my master cyl has enough pressure but not enough volume through that stok prop valve to lock up those large calipers hope someone agrees,btw stock booster and master cly from a 91 c 10 thanks
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