dont know for sure bout the 6.0 and pred.
i had one in my 02 7.3 loved it, egts could go crazy if you ran the highest hp load and i could rattle injectors like nobodies bus. on 110 hp load
i heard the 6.0 and the predator tuning didnt get along...call em and get the latest gouge, they were redoing it all last year... but i still run stock ecm loads now