I was wondering if anyone knows if all the F350 with plow package had the X code springs or do they have a different code spring. I found a set of front springs from an 2000 F350 that where removed when we it was only a few months old. Owner installed lift kit and put these on shelf. Owner is not sure of spring code just that they are off 2000 F350 with plow package. He sent me some numbers that are stamped on the springs is there a way to cross them to find code? U would like the X code springs since I plan on a 12v Cummins conversion.