Steve posted his conversion on the Forum on 7/5/08. The following pictures and quotes will help you through the process.
"I want to share some pictures of a master cylinder upgrade I did on my 59 FC-150. I used a Wilwood 1" TANDEM MASTER CYLINDER WITH REMOTE RESERVOIRS, PART NUMBER 260-7573. It comes as a complete kit reservoirs included. As you can see it fits in the stock location with no modification to the brackets except for a small notch for one of the bleed screws."
"The mounting bracket for the master is made from 3/16 flat stock. The center piece with the 1 3/8 hole is made from a 2 by 3" piece. The side pieces are 1 1/2" flat stock. When you weld the three pieces together, one side butts up against the center piece and the other side sets on top of the center piece. This is because the brake pedal and the rod that pushes in to the master is off center. I built the bracket first and installed it on the master cylinder and then installed the master in the truck before removing the pedal assembly from the truck. Set it in, get it leveled and then clamp it tight."
"After I removed the assembly from the truck, I bolted a piece of 1 x 6 to the mounting holes to keep everything square."
Wilwood 1" TANDEM MASTER CYLINDER WITH REMOTE RESERVOIRS, PART NUMBER 260-7573
Bracket mounted to Master Cylinder
"I found that the original pushrod only needs to have the ball remove from the end to be the right length. When you cut it off you will need to round the end."
Master Cylinder mounted to Pedal assembly
Notch cut for rear bleeder screw
“I finished the brake set up and in works great. What took me the longest was finishing the entire setup. What I mean is that I redid the entire brake system. I upgraded to 11" in the rear and disc in the front. The two reservoirs fit under the dash. There was no modification to the dash board. I did have to make a 3/4" spacer for the bottom mounting hole on the right corner of the dash. It did need to be raised up to keep the dash board from being bent down in the corner. The only draw back if you can call it one is that the dash will have to be removed to fill the reservoirs. Although you can see the reservoirs by looking under the dash. You can see the fluid level in them they are made of plastic. In the pictures I still had the remote reservoirs attached to the Master cylinder.”