Lowering Question

[Suicide-D]

Ok, I'm ready to start the suspension crap on my truck. I have a couple of questions. My truck currently has a 3/1.5 drop on heated coil springs. I am kicking around the idea of a 2/3 drop via coil springs. Will I have to relocate the shocks in the rear on a 3" drop? Who has the best kit for this? I've seen a few different kits at different prices... I only want to do this once...I don't want to go much lower than 2" up front because I cringe all the time now... I have long tube headers and they hang kinda low.

Thanks for any advice