Sorry for not being more clear. The purpose of the post was not to complain that something was wrong. Quite the contrary, the car drives much better than I expected. Now that I am watching it more closely, the simple answer is that the gearing is very tall in OD. It's pulling only 2000RPM at 75MPH. This is my first V8 in 30 years so I'm not used to seeing that kind of performance.
Sorry for the cross post but when I saw the section devoted to trannys I thought putting it there might get me the best answer more quickly.
Keith