Exact same for me. I did it a few years ago on my 65 C10 because I lost a wheel cylinder and ended up in my field. Held off on my 65 since it is very original, and everything worked fine. Then, the master failed and I drove into my tire rack in my garage. Bounced right off the tires with a square hit on the bumper, and immediately ordered a 67 power drum/drum master, and the dual lines/block to convert it. Works perfect, stops great.
Two doors, four doors, wagons, and ragtops.