Hi Room - Have a tech question re: Disc Brakes. Am building a chevy powered 46 Ford-74-78 Mustang 11 front and 85 Camaro Iroc Z 10 bolt rear - both are disc setups - is this enough stopping power for a car or that weight? and will I need a proportioning valve for the rears? The Front Mustang calipers are quite a bit bigger than the Camaro rears. Or should I just go with a new Wilwood setup? They get very expensive. Any advice will be greatly appreciated. Many Thanks, Charlyg.