Bad News Michael. Dodge did not do Production Numbers for the 2005's and 2006's (part of the reason for the Registry). If and when I can get all the VIN's and if my theory holds true, I can do a production sequence. I have less than 900 VIN's left to track down every VIN for every RAM SRT-10 and with the help of a friend at dodge, I can get the build dates. From there it will be easy, it just takes time.
Best we can do at this point is the Born On Date for the 2006's, and the answer to that is on your drivers door
Jeff