[ghink]

Thanks michelq & RABarrett for your help.
As to fuel starvation here’s the story.
After installing a new AC Delco fuel pump, purchased from AutoZone, the new pump was defective and was not the current model. I purchased another pump from a GM dealer complete with strainer. BTW the latest pump (AC Delco 88962472, pump) appears to be a better pump, very quiet.
With pump installed & tank on the garage floor, I connected lines & started my LaSabre and it runs like a dickey bird. De-fueled and proceeded to install tank in car-all is well.