I have one thing to say, blown head gaskets. tuning a supercharged car can be tricky for most people. Speaking of tuning, WHEN YOU PUT HEADS ON A CAR IT NEEDS A NEW TUNE. Timing, fuel, a good combo to go along with the heads. When it comes to 5.0s it is never just adding a part and having it work perfectly. I went from 102 mph to 108 mph by just messing around with a few things, not adding any parts, just tweaking the combo. Oh, I guess you missed the part in 5.0 about what happened when they combined the supercharger with the rest of the combo, hmmmm I think they made even more power and they probably could have made alot more with more fuel and timing, but what do know about any of this