Thanks Allen. I actually have that book and refer to it often since the Task Force trucks are my favorite. All it says about the slip yoke is that it's 23 spline and used on some other GM applications. I was hoping to find out what those applications are to know where to look for a yoke. I'm going to count the splines on the output shaft of my transmission to verify before buying anything. I've found a few inaccuracies in that book, especially the chapter on the OD transmission, so I don't want to spend any money without verifying that I'm getting the right part. Just yesterday I found someone on CL that's parting out a chevy truck with an MY6 transmission. He has agreed to sell me the slip yoke for $20 so maybe I'll have what I need. If I can find a part number for it I'll post it. Thanks.
