I hate to answer my own posts but it seems to be 1.5 inch per foot taper. As measure by an excellent machinist here at work.
Pat
For thoes of us who don't know(well,... me) could you explain what this is, and what this info could be used for?
Also: Mike's friend, Stan is a member here, his username is "37kicker" so you could always send him a PM to find out for sure.