That occurred to me too,but why would it happen with 2,000 miles on the truck since the new front brakes? I never did anything with the M/C,and it worked fine for a good while after.
   I ran into that very problem on my GMC when I changed it over to a split reservoir master cylinder and adjustable proportioning valve,but I was expecting it then-I was building a new system with unrelated parts.
   MY mind keeps going back to either oil contamination on the front brake pads or plugged ports in the Master Cylinder.  I guess it's possible the calipers have gone wonky,but BOTH at once? Not too likely. Maybe a pinched brake line? i don't think I've had it anyplace that rough.....
   Well,the BroncWorth is running relatively well now,so I'm not without transportation,so I can wait for a warmer day to investigate the brake problems. Until then though,any ideas you might have will be welcomed. 
    Thanks again!
   Speed