OK here's the answer. The clip that 94Eddie refers to is the one on the motor shaft. The linkage on the pivot shaft end uses a plastic cap that snaps over a ball on the pivot shaft arm. Niether the plastic cap or the pivot shaft and linkage assy are available from the dealer anymore. Being plastic makes it unlikely to find one in a wrecking yard that would be much better than the one I have. Mine was simpley worn to the point that it would not snap over the ball. I'm sure there are better ways to repair this with aif you have a welder or a machine shop, but here's what I did.
Turn the wipers on till they are at the top of the stroke, turn the key off so they stay up.
Lift the wiper arms, release the retainer at the base, lift the arms off the shafts.
Remove the cruise control diaphragm mounting bolt and lay the diaphragm out of the way.
Remove the two rectangular access plates in the firewall just under the pivot shafts.
Remove the 1-1/8 nuts from the pivot shafts and let them drop through the holes.
Reach into the hole in the center of the firewall and remove the retaining clip from the motor shaft. With the wipers up, this in very close to the hole. Lift the tab at the top of the clip and slide the clip off.
Slide the two linkages off the motor shaft.
Slide the pivot shaft and linkage out of the access hole depending on which side you're working on.
I was able to make a retainer with .032 safety wire by wrapping it around the ball on the pivot shaft arm and bringing it up and behind the plastic cap on the linkage. By pulling it up tight and twisting it, it holds the linkage to the ball so it can't jump off, but still uses the cap as a bushing.
After repairs, slide the assembly back through the access hole. Be sure the pivot shaft arms are facing down and slide the linkage back on to the motor shaft.
The drivers side goes on first. Place the retaining clip back on the passenger side linkage, then snap the linkage back over the shaft so both linkages are locked on.
Reaching throught the access holes, re-install the pivot shafts. Test to ensure proper operation, then finish putting everything back in place.
I hope that helps someone else. Note: If you only have a problem with the passenger side, you may not have to remove the access cover, the cruise control diaphagm or the pivot shaft on the driver side.