I have the Stewart LBS. It was about $80 when Stewart was selling it. It helped the rear locking up just a little but not enough. I'm going to an adjustable proportioning valve. I have disc front and drum rear. I got the kit from Master Power and have had trouble with the rear locking up since I put it in. The truck is apart now but when it goes back on the road I will try the adjustable valve.
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1980 Chevy Shortbed Pickup
1969 Z28 engine
Turbo 350
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