I did the Shelby drop on mine this time while I had it all apart. I didn't but any fancy drill template. I simply used a 3/4" wide piece of flat stock aluminum and trimmed it to the exact bolt center to center. I held the piece directly under the center of each existing hole, right up to the edge and made a sharpie mark under the bottom corners of the flat stock. Double checked that the center to center of my new marks matched the existing and then drilled. Since I held the flat stock to the edge of the existing hole and used 3/4" material, it gave me the total of 1". After I got the holes drilled, there were two I believe that did slightly break through the edge of the double stamped metal. I just decided to roll with it. I don't think it will hurt much. I also bought the roller upper control arm conversion kit, roller perches, tubular lower arms.
When I jacked up the lower control arm, I had a magnetic angle finder attached to the rotor and watched throughout the travel. I was very pleased to see the arc stayed within 1/2° the whole time. I am also using the camber lockout kit with interchangeable blocks. I have not had the car back on the ground yet to see how it will all settle.
Also, I am using some 1/4" steel plate to replace the upper shock mount. This will help with rise, but also limit the compression, because the shock cannot go back up as high. I also made my own adjustable strut rods with heim joints.