The 3.73 vs 3.91 Dilemma

I understand your concern about 3.91s in the highway. I had them years ago and drove from my house in Pittsburgh to the Mopar Nats in Columbus, Ohio. Between the engine RPMs and the fact that I removed all of the insulation (didn't help the weight) I was NEVER so glad to get out of a car. I was sweating and my ears were ringing LOL. Theses were however NOT as bad as the 4.30s I had until I blew them up. The car now has 3.55s and although I miss the acceleration of the 4.30s its much happier on the highway and for that matter around town.