Re: driveshaft/ST400 noise?
The '67 Riv still had an x-frame, as far as I'm aware. The driveshaft runs through the center of the X, which is plated on the bottom and top of the frame rails. If you tried running a one piece shaft straight from the trans to the rear end, the bottom of the X would interfere. Hence the need for the center double cardan, and slip yoke setup.
Originally Posted by 71skylark3504v
I find it hard to believe your whole driveshaft was junk. Even if it was, each component is rebuildable or replaceable. I don't know what you paid for your custom shaft, but I paid about $400 to have my driveshaft shortened, totally rebuilt and rebalanced, including a new trans yoke, u-joints, double cardan joint, and rubber bushing for the slip yoke.
1962 Buick Invicta, 407 Nailhead,
ST400 manual VB trans, 3.23 Posi