i have my stock plate forward and can slip the lock up clutch if i ease into it 45-55 in OD (which i don't do). wastegate is disabled too. i'm seeing about 30 pounds of boost and only 1100* is all i can push out of it. try it at your expense, but slipping a manual truck is going to be worse than mine as i don't rely on the clutch 50% of the time.