A body top speed
I couldn't tell you.
The old '72 Duster had 3.23's and I'd shift out of second into third at around 6200-6300 r's. By that time you needed to look down the road a 1/4 mile ahead because what was coming was coming in a hurry. Looking down at the needle was a luxury you didn't have.
Funny aside, for all the high powered cars I've driven, the only one that made my stomach flip was the old Hyundai XG350. Full throttle it would slide into 5th gear at around 100mph. The engine would go lean, the r's drop off, and then rebound in hurry. Instant stomach flip.
I never had enough road to see how fast that car was. I had to pull a maneuver one time where the throttle was the way out. By the time I had the ability to take my eyes off the road and was out of dodge, and lifting off the throttle the needle was coming down past 125.