X2.. I love F.I.,Mopar provided only a couple programs,for the 300-380 Magnum crates. Mopar Action pushed hard for that,and finally got it. I know a couple old time hot rodders: one embraced the dyno roller(likes 5.0/4.6 engine swaps..), The other embraced multiple passes on the Vericom 2000 ( yes ,one still works nowadays..), with his carbed setups.(Rats,SBC& wedge Mopar strokers..) One takes days to do it,the other takes hours,at a higher price: much quicker. That wide band O2,is a really good middle ground option.( never tried one,an option with time)...