I have been wrong before but I believe it is a matter of the drive ratio rather than the engine size. I have the original 235 in my 54 3100 but a 1979 Nova rear end with 2.73 gears and I can cruise way above the posted limits. In traffic, I can accelerate with the best of the lead feet. but not so much with the show-offs in their Camaros and Chargers. They seem to say look look at me. I know this turning into a rant for me. We have a main highway that goes through my town called The Bypass, it was a Bypass when it was widened to 2 lanes each way and a center lane. But not so much now, it feels like a drag race track. The posted speed limit it 35 and I have set my cruise at that and have traversed the length without missing a green light and have watched heavy foot drivers hit each one. BTW I also have a T5 trans.
