1990 XJ40 (Power) Steering Rack Movement

I just had a mechanical fitness check on my car - it is required since
I have to transfer the ownership from my brother's name to mine.

The mechanic said change the left inner tie rod, so I am in the
process, but when I took the old one out it did not appear worn enough
to contribute all the movement the mechanic showed me in the wheel.  

The rack however was appearing to shift back and forth what seemed to
me quite a bit when he moved the wheel back and forth on the hoist.

He said the rack was okay, just change the tie rod, however.

What I am wondering is that after I get the cert. from this mechanic,
should I really do something about the lateral movement in the rack?
Is this why the car has always steered like a pig, in a jerky motion -
reluctant at first then begrudgingly turn?

Are there some bushings, spacers or rubber bits I can replace, or is
there some adjustment I can make?

Any suggestions, or should I just forget about it as the cert.
mechanic suggested?

Best regards,

- Tom