Thanks, all. My (former) mechanic did indeed just forget to install the
retaining clip. 15 minutes yesterday morning put things right. He was none
too please to see me again but to his credit, he made it good without
complaint. What else could he do?

I was having the steering replaced in order to pass MD state inspection.
Related question:

For those that have bought a Cardone "long rack", did it come with or
without mounting bushings?

--
mordo
1990 Carat