The comment of being young hit a nerve for me.17 years old. I traveled from Pittsburgh Pa to Denver Colorado 1600 miles in my 70 Duster.This was back in 1976.I would do exactly that. Swap the 8 3/4 pig from 3.91 to 2.76 for the drive and swap back to 3.91 once I got to my destination.Did it twice a year for 2 years. Oh to be young..