I use to drag race several different stick cars, you can change the first gear ratio to make the car leave harder without changing the rear gear IE, we used a early A body NP833 23 spine tranny in my old 340 Duster street and strip stick shift car, the stock first gear ratio in them is 3.09 My current street and strip car I'm building now has the O.D. NP 833 tranny with the same first gear ratio and .64 % over drive, I'm using a 3.55 ratio Dana 60 in that car with a 464 C.I. 440 motor on pump gas, hopefully the O.D. tranny will hold up to a little abuse
Adding a 3.09 1st just makes the gear spread terrible. I will drive it more than race it If you're putting a lot of power to the overdrive 833, I'm thinking you're going to be disappointed with its longevity.
1969 Dart GTS 340 1969 Super Bee X9 N-96 1969 Coronet R/T X9 N-96 2015 Dodge Dart GT 2019 Ram 2500 Big Horn. Looking for the original block for my Bee. The last 4 are 7449