I have a Hughes 8" in my BB Dart Sport. It only goes about 4,200 behind this low power thing but it's a lot of fun! Went to 5,900 behind the 493 in my Challenger. Hughes said that's as tight as it goes. Seems to be fine cruising at 23-25 hun rpm. It doesn't like the hills much and you have to get the rpm over 3,000. Just getting into it without tipping the secondary it pulls hard and only goes up to about 3,400 with a 3.23 gear. No trans. cooler.