strange throwout bearing problem

[CobraV8]

I have a toploader 4 speed in my car, with a master and slave cylinder setup.

The problem is as folllows: the clutch fork moves a little towards the throwout bearing when you engage the clutch:



This causes the small clips on the throwout bearing to break off after some time or even pulls out the rivets that hold the clips:



The clutch fork is not secured radially in any way. It only rests on a pivot like this:



How is this supposed to work without damaging the bearing?




I also noticed that many clutch forks have a metal clip riveted to the underside like this one:


The one that's in my car doesn't have no clip or holes for rivets at all. But it has holes through the side rails of the fork, just below the pivot point. Looks like they were ment to bolt something through:






Will this fork and pivot not work together? All parts are Ford OEM. Any ideas?

Thanks,

Simon