FS I have a 904 mineshaft 100 % brand new never installed. If you are looking at this than you may already know this but it allow a 901 trans to have the 2nd gear changed out to a taller gear. Great for AutoX & track guys or a big motor conversion where a taller gear is needed. $875 plus shipping no tax LOL If you check around this was the hot setup, and as I understand it NLA Heeltoe914@aol.com
Pics up in a few days.