If your 68k vintage mac has not been re-capped.  do it... regardless. ( wether it works or not )

We can beat up the topic,  but really it doesn't matter... change those caps.

Wether you Do it... or you have a friend do it...  or even if you are storing your collection for long term you can 

at-least remove the original caps then you know the goo will not leak out and rot things all to heck.

Once that goo leaks out and starts to rot things up, it makes the whole the whole re-cap process way worse.