Vortech actually had about 3 revisons while using the spline type shaft. The newest is completely different type of coupler. Read more at this thread:

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=turbo&Number=256308&page=&view=&sb=5&o=&fpart=1&vc=1


Previous Owner of 00 SVT Contour #1077/2150 95 Contour SE '01 3L