I have been told that this truck was made by special order only and that the 5.3l has a 327ci vs the other 325ci 5.3l which is a much better engine. Can anyone verify these claims? Or does anyone know of this package that can offer some insight? She has a superchip, AFE cool air and a few other tid bits as I'm still exploring whats been done, runs like a dream so not complaining either way, just good to know if this is true. Thanks everyone for reading.