[alanwoodieman]

converted my brakes on my 41 1 1/2 ton to dual master cylinder using F-250 master cylinder 68 to 72 and a home made 3 to 2 hole attachment bracket it was easy to do and worked great. I also have done the same on my 41 3/4 ton truck using a F-100 mc from a 68 to 72 truck