Ok, I had figured that, I'm wondering what the differences in the actual system are. I drove a company 2006 f350 hauling vegetables around the state and it would stop pretty amazingly with10,000 extra pounds behind it
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not getting your question...
ones powered by the power steering pump, and the other is powered by the vacuum pump??
completely different components on the power brake/hydroboost.
the PS reservoir has 2 return nipples on the HB.
the pedal has a pin higher up on the arm.