Thanks for all the feedback. The engine performed near perfectly on the drive home from work. I'll keep my fingers crossed that all will stay well with the engine.
I'm still thinking that moisture is the problem. As far as vacuum leaks are concerned, all lines are pretty new and have clamps to make sure that they seal properly. The CHT is new as well. The battery is just a few months old and charged occasionally when I don't get to drive the car as often as I'd like. Anyway, thanks for the input. You'd think that a 26 year old engine would know how to behave by now!
David Pritchard