It depends on the clutch brand. Raybestos suggests .008-.012 per disc. I use the red racing from crt or coan when I built mine, I have a TCS 7 clutch direct think I used .060 total, rear-forward hemi drum (2nd) I've got 5 disc with about .040 total. The kickdown lever is a 4.2:1. T/A cheetah rmvb. The only thing is you have to get the correct timing between the lever and clearances from 2nd to 3rd. Mine shifts firmly. I went with the tighter ratio due to burn in. I've got a 493CU 440 in front of my 727. hope this helps.
