You need minimum 3/16 plate not sheet metal. I used a Warrior caliper. Hvae to look to see if I could have done it without welding, I welded 3 nuts for threaded spacers welded to plate. I have pre 03 carrier,axle, hub & rotor. Works fine other than I need to re-do pedal, extension to far from pivot, no mechanical advantage over master cyl. And yes I have both floating cali and hub, no problems.
It will take some work to get pics as it's standing in the corner for being a bad boy. Blew the counter balance gear and bearing, chunked the case. I'll see what I can do tomorrow.