That is a lot of rake.... With those numbers it doesn't sound like your truck even has the 1" raised ride height. The max rake I've seen on a standard 1500 is 3.25". Most are closer to 2.75" or 3". So based on that and the assumption that your truck doesn't have the raised ride height the Bilsteins will give you 2.8" of lift leaving you with 0.2" of rake.
It does have a 3" rake. What I was saying is if I take that 1" more that it has out it makes it a 4" rake to work with when adding the Bilsteins.