This is not K5 related but still in the Chevy truck family. I have an old 1968 Chevy C50 dump truck that has a single reservoir master cylinder. I think I will have to replace the present master cylinder and was wondering if I can convert it to a dual reservoir M/C, and if so, how do I do it, and what parts would I need. The only thing I know about the present brake system is that the M/C is mounted to a vaccum booster on the fire wall, and that the rear wheels have 2 wheel cylinders on each side, and the front wheels have 1 wheel cylinder each. My reason for doing this is because I would feel much safer while hauling 5 yards of whatever if I knew there was a backup system. To my knowledge if the single reservoir system M/C or other parts of this brake system fail, I will instantly have no brakes at all. Thanks for any help you can offer.