From what I've been told, I don't know if its true or not, but the 03 6.0 PCMs only work with 03s 6.0 on stock motors. For some reason it was just that year thats not interchangeable. I dont know if its true or not, but its what I was told.

Why 6.0 intake. Arent all the 03+ truck intakes the same? Besides the 8.1