Im at my next mod im tuned by lund got beefcake special on it so should be 620 or so never put the car on the rollers. I want to get a converter what has worked best with everyone's set up how big can I go on a daily driven car? Should I do a full fluid change when I do the converter or just fill it with ford fluid? Any and all help id be thankful. Any other suggestion on mods as well? Ill update mine so everyone knows what im working with.