Dropped from a 3.5 pulley to a 3.2 tonight, zero knock, and not running lean at all. It's completely stock besides the down pipe, catback and intake, so the intercooler is really doing work! It pulls freakin' awesome now... However at the end of the test run the power steering started acting up, working kinda intermittently. Seems to work fine when it's revved a tiny bit, but at low rpms it feels like it's not working at all. Gonna check on it tomorrow, hopefully it's just low on fluid or something.