Just talked to a tech at the quarter master place and the guy measured their spline tool for me while on the phone. It came out to around 15.23mm.
Check this ram piece out from jets though. It says the pilot bearing part is .667" which is spot on to your measurement Brian. More expensive though....
http://www.jegs.com/i/RAM+Clutches/798/03-048/10002/-1
Check this ram piece out from jets though. It says the pilot bearing part is .667" which is spot on to your measurement Brian. More expensive though....
http://www.jegs.com/i/RAM+Clutches/798/03-048/10002/-1