materials: (3) pieces of 3/16" flat stock (1) 2"w X 3"l flat stock (2) 1 1/2"w X 3"l flat stock (1) Wilwood tandem remote dual reservoir master cylinder (part #260-7563) the 2" wide flat stock will need a 1 3/8" hole drilled into it, and (2) 11/32" holes drilled in it to mount the the new MC to. i only pre drilled the hole for the hole saw. you can drill or just mark the other holes now, they are the 11/32" dia, and all holes are drilled in a line vertically. i waited until after i was done welding to do the hole saw to minimize deformation. below is a schematic of the MC dimensions from the Wilwood site: when welding together, i only put 2 beads on the inside at each corner. if you try and weld one big seam, it will warp. this is the inside of the mounting bracket. the new MC will mount from the other side. hole drilled and all holes deburred: painted black: holes are off center. This is because the brake pedal and the rod that pushes in to the master is off center.