9" vs 12 bolt.

[james schaechter]

Originally Posted by Dirk Olson

Better gear selection with the 9 bolt. and using a dewco center section with a 9.5 ring gear starts to level the playing field. Given the ease of gear change out, gear selection, it would hard to go to the 12 bolt unless class dictates it.

I changed from a 9 inch to 9.5 inch Gleason set up. These were pretty common pro stock set ups years ago before they moved on to bigger stuff. Much more efficient than the standard 9 inch