I know everyone swears by the big three (Dave Husek, Janice, and Extreme auto), but in MY experience, I took it to a shop in the middle of nowhere perry Michigan and they did my 200, for 1700$ I have a 550 capable trans. And with a 3 year warrenty… they said when I bring it for a rebuild they’ll do a billet input shaft and all the other billet stuff for 700+ hp.. that was 2 years ago and 8000 miles ago.. ran probably 5 gallons of methanol through the motor so that much time at wot shifting through the gears with a 3200 converter, many foot brake launches.. Just my experience. Then again maybe I got lucky..