After two weeks of replacing this and that, I finally found my little bug! I included this reply on a couple of other posts so other will reap the benefit of this fix....
...I replaced the plugs, spark plug wires, distributor cap, rotor, and the DME relay. All failed to solve the problem. I was about to take it into the local wrench, but decided to have one last look-see.
I was looking for vacuum leaks, loose connections, etc. - and I stumbled across a four-pronged connector (it resembles the type of connector on the DME relay) that sits directly behind the drivers-side intake manifold. The connector is hidden. I had to use a mirror to see it. (Anyone know what this connector is?) As I picked up the wire to the connector, the bottom part of the connector fell away. Ah ha! I found my loose connection! I plugged the connectors back together and viola! My baby was back to its old self! No more hesitation or misses!
Thanks for all the posts and suggestions. I've seen quite a few other posts with the same problem I had. If you see one of these, pass along this bit of info.