That’s where I had the Chrysler at over 140. There are actually not all that many places in the east where you could sustain that kind of speed.
My wife and I bought a 1941 Cadillac “resto-rod” in Indiana and drove it back home through Montana on I-90. The car tracked straight as an arrow and didn't have a shake or vibration north of 100. The only time we held it under 90 in Montana was when we were off of the freeway.
It was the best vacation we ever had. We drove it back across the country ourselves when we sold it. It was an incredible car. Too bad sometimes you just run out of money.