74 Duster 408 Daily Drivability with 3.73 Gears Vs Stock 3.21 Question.

Guy that installed the 3.73's lives in a good sized town with the main drag minutes away. I live in a very small town a highway runs thru so I'm a good 15 minutes from a good sized town. With the 3.73's I'm really turning the R's down the highway. I've had 3.55's in other cars and they also seem to tach a bit high. I was really worrying about take off also, clutch chatter possibilities etc... going back to the 3.21's. I don't plan to drag race it so trying to tame it down some with the stroker still in the car. I will need to take a look at cam size.