In order to improve on the braking capabilities of Mark Allen's car, Bob Depalo has installed a HydroBoost assembly. It is fully hydraulic and works off of the power steering pump. In Mark's car, that pump is electric from an S70 Volvo and works in parallel with the power steering rack.
https://www.v8registry.com/robert-depal ... ansas.html
https://www.v8registry.com/mark-allen---decatur-il.html
https://www.v8registry.com/2019-corvair ... kshop.html