I have a '70 Sportsroof that needs help in the braking department. When I bought the car it had manual front discs and rear drums. I needed to really start on the brakes to get the car to stop at all so I upgraded to power brakes but didn't get quite the positive change in braking I was hoping for. I think that part of the problem is that my cam doesn't generate enough vacuum to power the booster. A friend of mine is running a manual brake system with a dual piston master cyl and 14" Willwood discs up front and stock drums in the rear and has great braking. I'm thinking about doing something similar but don't have the $ for Big buck brakes like that. There are a number of systems available using 11" rotors with 4 piston Kelsey Hayes calipers but they all adapt to drum spindles. I'd rather not spend $300-400 for new spindles but can't find a system that works with disc spindles. Any suggestions on how to increase braking without breaking the bank would be greatly appreciated.