Lowering Problem/ Question

[slepnstang]

I am in the process of rebuilding my frame and when I got the truck it was lowered in the front with springs, I am assuming they are 2". I need to get new spindles due to the fact that the previous owner had a regular and a heavy duty spindle on the front. If i get a 2" drop spindle in addition to the springs will my truck have a 4" drop in the front?
What would I need in the back to level it out?
Any pictures of this combo would be great.