Classic Performance Products
 

Installed their booster/master cylinder kit on a 48 chevy pickup. Installation was pretty straightforward, use the bracket for template, drill holes, and bolt it on. Booster and master cylinder both seem to be good quality, but the proportioning valve is junk. That thing leaked at every fitting. Finally had to change one fitting to stop the leak to the rear brakes. Took longer to fix leaks than it did to mount the unit.