Pivots are available for the '76 and up, but NLA for earlier.
A couple of places (Barneys? And?) were selling the '76-up linkage modified to work with the earlier windshield.
Note that all the windshields with bottom mounted wipers before 1976 are the same.
Everything changes for 1976.
The '76-up parts, Jeep 5453957 and 5453958:
https://www.quadratec.com/products/55305_00.htm
"5453958K" here is Crown packaging all the linkage parts together.
Quadratec is the largest retailer of Crown, the company that makes these things.
From Jeep, the DS pivot is separate, but the PS pivot comes with the connecting arm riveted to the pivot.
The '76-up arm is the wrong length for your windshield.
Maybe two of the '76-up DS pivots can be made to work.
Used from Daryl will be guaranteed to fit ...