Hey Coupe, I spoke w/CCP when Ipurchased my under the floor unit and was told that the power booster (mini or whatever) will not work because of the spacing problem with the floor clutch pedal. They gave me 2 ways to go 1 which I chose , keep my original pedal and just install the dual cylinder with disk brake on front rear drums and lot better brakes than original! duh... or 2 put ir on the firewall.a no brainer for me. also dont forget your 2# and 10# valves if u decide to go that way.Look here.
www.classicperform.com Good luck. Mike