BB and modern 8 speed Auto transmission ?
What people neglect to realize is all these modern LX cars have 2.6X to 3.0X rear gears.
So low gearing in the 8 speed allows that numerically low rear diff to not hurt performance.
You would be nuts to pair with anything numerically higher than say a 3.23.
A V6 2018 challenger with an 8HP70 will out 60' and out 1/4 mile a 2010 charger with a 5.7 and a old Mercedes derived 5speed.
Same car will then go get 33mpg Hwy.
Gearing is a magical thing if you know how to utilize it.