I've run standard Raybestoes tan frictions at 700hp#3400#. Over 700 passes w/o an issue. Current build has Kolenes and Altos in the front clutch .012-.015 vlearance per friction . Rear clutch has standard silver stock frictions. Rear clutch .025-.030 total clearance. This trans has gone over 400 passes on these parts currently. 900hp@3350#. Band adjustment varies with KD lever ratio. 5/16" is a good starting point. I like the red solid KD band.
Doug