I am finishing up a disc conversion on a 91 HF. I want to swap in an Integra MC, preferrably 1", and a compatable power booster. I am also planning on doing some brake plumbing to include a rear porportion vavle.

I found these parts on partsamerica.com...

Bendix MC: Part # 12445

Cardone PB: Part # 532510
Bendix PB: Part # R2517757


The Bendix PB says it is a HydroVac unit? Anyone know what this means, not sure if I need or want it?