IT"S ALIVE!!!!! I watched a video of Pierre Hedary's again and found the answer.
https://www.youtube.com/watch?v=zXJkvD4rjPI

It was the OVP relay. My '91 350SDL runs the same relay. I pulled the OVP from the 350 and swapped it out to the 300. It took a few cranks, but it caught and run like a scalded dog. It still needs some fine-tuning, but it's up and running.

Thank you to those who replied and put up with the rantings of an old man.