Thanks Ray. So if there isn't a proportion valve and pressure is the same front and rear, it should react with rear drums engaging before front discs, causing rears to lock up in a hard stop. I think I'm going to change the distribution valve, large line in frame to the rears, flex hose to rear distribution T block (all looked to be in good shape, maybe corrosion on inside of the tubes have restricted the flow from 43 years of moisture). Only thing I haven't changed. Thanks for the help guys.
Jim.
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