Some of these have rigid forks, some have suspension.

If yours has a rigid fork, much easier to deal with, as there's very little to go wrong other than damage.

If yours has a suspension fork, first have to find out if the suspension is shot, as it often is after decades. If it is, can it be replaced or rebuilt?

Trying to get a suspension fork that fits - and retains somewhat the same angles and stack height - can be a nightmare, so I don't recommend that option.

There seems to be a bad vibe for older carbon/alu hybrid frames that I've never understood. Unless you're a really hard rider / masher, I wouldn't worry about frame integrity.