I have a modified one, 26 spline in/ 31out with carbon lined rings and some other goodies that I will be usuing here shortly. However stock they are much like the TKO's, dont like shifting higher in the RPMS but use a different main shaft. A lot of the older ones are tanks and take a huge beating even with the 10 spline setup. I wouldnt pause on buying one if it were priced right.