Hi cavebull - To answer your disk brake question. You use 15" with the ECI kit. The rotors are 11" 5 lug Chevelle with a 5x 4 3/4" bolt pattern. You use modern wheels for disk brakes. Most old style '40's-early '60's wheels won't fit because of clearance problems with the capilers. I used manual master cylinder.
To gazim - you don't need a proportioning valve if you are using drum brakes all around. You need proportioning valve if you have disk brake front and drum brake rear. Go to website for Master Power Brakes.com They have a lot of info there.
