I changed my 66 Newport from the single to dual sump mc. I bench bled with silicone fluid, installed and bled the right rear until the fluid color changed, left rear, right front and ended with the left front. My paint is original, but I still don't have to worry about fluid leaks hurting the paint. I also planned to add disc brakes in front, so I installed a disc brake mc right from the start. Works fine with the front drums.