[kipps]

There's two styles. The older style secures the rod with a rubber grommet. These supposedly come out with a big jerk.

The later style is "staked." The metal that surrounds the rod is punched, or "staked" around the rod, holding it in place. These are not intended to be removed. Folks say they can be pulled out as well, but it takes a lot more force. Most folks fabricate a small puller to unseat the rod. Re-installing the rod is easy enough. It can be re-staked with a small punch.

You probably have the staked style.

The hydroboost I pulled from a '82 or '84(forget which) was staked. When installing a seal kit in that hydroboost, instead of removing and re-installing the rod, I cut and re-welded it.