Thank you Bob, the sender is the bell shape one, I haven't pulled it to see if it is a Ford part or not. I will probably run a secondary aftermarket direct pressure feed gauge just to make sure everything in fine as I chase the "jitter" :-).
This is the first 428 SCJ car I have had and I will say, I am very impressed with the power especially with the drag pack 3:91 gears. She pulls very hard, I'm very blessed to be able to be a caretaker of it.