T56 Magnum and ZR1 Clutch Questions

[InMotionJosh]

I am going to be using a T56 Magnum (wide ratio) in my 69 camaro behind a ls3. I am looking to use the Complete kit from American Powertrain including their hydraulic setup. If I am to use the Zr1 clutch i know i need a new 6 bolt flywheel and the clutch but is that all? The American Powertrain setup comes with spacer to space out the bearing instructs you how to measure to make sure your tolerances are correct.

Anything that I'm missing or thinking of incorrectly?