Hi Richard, and all Everytime I talk to Frank, at "The Driveshaft Shop" in Bohemia, LI ( 1 800 564-2244) he also suggests replacing the trunion with a regular u-joint and slip-yoke . "The Driveshaft Shop" is a large, well-established rebuilder of driveshafts and CV-joints. They also do specialized driveshaft work, for racing, custom fabrications, etc. ; when I keep blowing driveshafts in my '62 300, they invited me to bring it in, put it up on a lift, took measurements, and repaired (once again) my driveshaft without ever charging me a dime for their services. This is the car that I used to drag race. My feeling about this is that the front joint system ( trunion) installed in the cars was more than suitable for years and years of good service ; so far I have resisted making such a change, especially on cars like my gold 300G that I prefer to keep as original as possible. As the parts to rebuild the trunions become harder and harder to find, we might just have to consider making such a change. Of course, we could keep our original driveshafts and bolt in a replacement slip-yoke style... John