Frozone,
The AOHB system looks just like a Hydrovac system except it used compressed air instead of vacuum, so the MC and it's linkage are the same either way. The AOHB Booster is also smaller in diameter that the Hydrovac Booster.
Mike B
Thanks for enriching my knowledge. My answer was based on another truck I had where the hydraulic part of the booster was mounted under the bed of the truck. In that truck there was just an airline going from the brake pedal to the brake booster mounted under the bed. I just assumed this was the case for this truck as well, my bad.
