Zakkb787, I have a buddy with a 02 RC/SB front end converted to 06. Made 987/1698 and is set up very similar to the way you were talking with 150s, 12 mil, s475 single, built trans, 4link. Was talking to him the other day (Very very knowledgeable guy) and was talking it should run low tens and maybe nines if through another turbo over the s475.