Rapid588,
Keep us posted on your experience with those two valve bodies. Pro Trans makes some top notch stuff, and I like the Griner valve bodies too. I have the Griner high pressure manual valve body (no brake) in my car. But some day I might go to a trans brake, especially if the local track switches from electronics/non-electronics classes to "box"/"no-box" classes like some other areas of the country.

All: I have heard two schools of thought on the front clutch pack clearance. 1) 0.010"-0.012" per disk, and 2) 0.015"-0.020" for less drag in lower gears.