Thanks for your replies.
I was able to start the car and move it into the sun so I could have a good view of the wiring under the hood and while there, I checked everything. After jiggling wires, the car wouldn't start so I thought I was on the track but found nothing. Long story short, I am pretty sure I have a bad ground (Thanks, Captain America 2.5) under the dash because I found a black wire that was placed there by the guy who installed the engine and it was loose under the bolt holding the steering column. Of course, the car started immediately and I moved it so I could get my other car and my wife's car out of the garage.
After moving the errant ground to where it could make contact, the car not only started but the odd flickering of the dash lights, radio, etc stopped.
Getting under the dash wasn't good for my back so I'll find a local guy to get under the dash and tighten everything. Disability sucks big time.
Thanks to all who replied because you sent me to the right places to look. I will check mounts again for the clunk.
Edit: It was Lou who sent me to check grounds. Thanks Lou and the fusible links are alive and well.
[This message has been edited by starlightcoupe (edited 09-03-2014).]