74 Duster, resto mod 6.4 front end rebuild questions

simple mod for more space and ease install / removal.

HDK replaces the lower portion of the 2-piece shaft with a piece of 1" DD that is held solidly in place by two set screws and a new sturdy bearing. No longer a need to loosen the column once in place

lower section of 3/4" DD slips into the 1" DD and cut with approx 2-2-1/2" into the 1"'DD. The 3/4'' DD shaft will slide easily in / out but is held securely into the 1"DD

use a Borgeson vibration dampener / u-joint to connect to the 3/4" DD shaft to the OEM shaft spline.

the shaft size is now 3/4" solid vs the OEM hollow 1-1/8 od and makes install or taking off or completely out a breeze.

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The idea being that the lower portion becomes the collapsible section in the event of an accident? Or do the upper set screws still slide some if something bad happens?

That's easier than trying to weld the larger slip tube to the stock shaft for sure.