No need to call unless you want to know which program is in the box. What is the Serial Number?
2003-2005 trucks all used the same exact TST model. Only difference was the 2004. 5-2005 trucks came with a different type of boost elbow that required running boost tubing to the intake manifold.
2006 and 2007 trucks use the exact same box and timing harness, but require a different injection harness as the 06-07 trucks went to a 2 plug design from the older 3 plug design.