Question about gearing for Top Speed
Let's see:
2.94s at 70 mph was running 2500 rpm, that equals 5000 rpm at 140 mph
Then 7000 rpm would be 170 mph.
Wind resistance and how much power under the hood are going to be the limiting factors.
Probably going to need at least 350 horsepower to get to 140 mph. From there on is your guess.
This guy might know, 500 plus cubic inch.
☆☆☆