I did the same on brakes on my 69, all the pcs came from a 75 C10. I had to drill the holes in the frame for the brake hoses tho. after that, I used the master,lines , & prop valve from the 75(mounted in the same spot Scoti has his). I also used the '75 12bolt,along with the brakes on it. Mine is manual disc, so I couldnt say what mods need to be done for the later booster. best of luck,crazyL