Best modern standard trans for old school 383 Magnum

I'm an old school cuda guy with a '70 Barracuda and trying to decide on a transmission. My car is a Gran Coupe 318 cu in auto trans. I'd like to go back with a tunnel rammed 2x4 383 magnum but I want to run a 4:88 to 5:13 gear in a Dana 60 but I don't want my top speed to suffer. Looking for some good options. This car will just be a toy. Everytime I drive it I will be driving it like I stole it, abusing it in every way.
Author: Rickuda