ET Estimates please

So my car should have 6 to 13% left in it then?

That's 10.32 - 9.50

10.32 might be believable. I can definitely see at least a 10.70 with the converter change.

My trap speed and RPM is 124mph/5300. That's with a final gear ratio of 3.55:1 (3.6)

My guess is trapping at 6200-6300 will make a substantial difference too.