Solved!!

I took the long way to get there because I saw other problems. Therefore I did troubleshooting with other areas then ruled them out before getting to the Control Box, or to be specific (MAP Sensor - Vacuum Line #21). Here's what I did...

Swapped in a good ECU (No change)
Replaced the injectors with clean, used ones (no change)
Sprayed fluid around the intake gasket


Finally made the shift to the control box where hose #21 was pinched and surge disappeared. Opened box but was a pain to separate, so I swapped with known good used box.

Installed new spark plugs
Adjusted idle speed since someone had hosed that too.

Now it's almost purring like a kitten. Has a slight miss, so will need to investigate that. Plan on pouring a can of Seafoam in the tank since it's been sitting awhile.

Thanks for your help.