We've got a 97 in the shop that is pulling to the left while braking. The left front pads were shot and rotor was cooked when it came in. Right side pads had about 1/2 lining remaining and rotor was ok. We have replaced the following during this nightmare... pads, calipers (napa), lh rotor (right is nearly new), lh wheel bearing (noisey, grease gone from overheating), brake hoses (had small abrasions in them). cleaned and adjusted rear brakes, blew out front lines with compressed air. Truck does not have a wheel spacer that is common on right side, no front end play noticed, truck drives straight when not braking. On a dirt road when slamming on the brakes, the lh frt will skid and the others will not. On a rack if we slowly depress pedal left front will lock up and all other wheels rotate freely at that same time... . restriction in the line running from the lh line to the rt wheel? Got probably 10 hrs in this pos and it is driving us nuts! Please help.