Driveshaft 65 question!

67Dart273,
I am sure a lot of people wonder about the "stronger" claim, and I might have been stretching. I base that on several claims in the links above (perhaps by the same guy) that he ran a 440 hard and never had the front Detroit joint break, whereas he had failures of his rear U-joint and even the differential yoke of his 8.75" rear-end. Still, perhaps the front joint sees less forces. Does the rear tend to break/wear more even when both are standard cross type joints? I don't know. It does seem that if they worked fine in trucks (318's), vans, and Jeeps, the later known as driveshaft destroyers, they should survive a long time in a light A-body w/ slant or 273.

I like the idea of putting the sliding component outside of the transmission. It always bothered me that the yoke slides in and out of the seal, dragging grime with it (my 69 Dart, 65 Newport). My guess is that lower cost was the main driver for the design change. My 80's Mercedes have a fixed flange transmission output like my 64 & 65 A's. However, they use rubber flex disks for axial motion and maybe anti-vibration (not terribly reliable).