I guy I work with has a 69 Camaro with 6.00 gears in it.
It is a 496 ci. Big block Chevy and he sprays it with a 250 shot of Nitrous.
He said it runs 5.20's in the 1/8.
I thought that was way too low a gear for Nitrous.
Think about it, tight converter you need that gear reduction. Have you seen what gear the pro stock boys run? Most mopar engines are dead at 6000 (I know there are a few who buzz them) so I guess they only need those 4.10 gears. What gets me is you have a head that flows 500 cfm and you turn it 7000, a lot left on the table.
