rear gearing with a four speed A833.

A definite sign of the times is thinking 3000-3500 RPM cruising speed @60-65 MPH is Way to high! When in fact these were acceptable perimeters back in the 60's - 70's and even into the 80's. Now days with the younger generation use to 5,6,8,9 speed transmissions and every car/truck coming standard with tachs. The thinking is that a car/truck needs to turn 1500-1800 RPM @70 MPH to be "right".
This is why I drive my 07 4x4 CTD when towing or traveling. But when I drive my 500 cu.in Dart to cruise nights, I really don't care about the RPM's @60.
Don't worry RRR, your still on my Christmas card list. LOL