That was my though as well. A 180/200rpm drop going into gear with a TC that physically flash-stalls to 3000, with 4.10s, is strange behavior to me. This is why I suggested the wheels-up test.
By your numbers, advancing the cam from where it is , will not help. Something else is going on here that I don't understand. Ima starting to think that your cam is bigger than the cam-card you have, says it is. Since you didn't buy the cam new; what are the chances that the PO gave you a wrong cam-card? Did you have any trouble degreeing it? Did you check the exhaust installed centerline?
