How low

[Boog]

Hey neighbor. Welcome aboard. Please don't get the wrong impression of us as a whole. There are a few crusty ones here as there are in most any groups.
Being as you are new and unfamiliar with these forums look around and kick the tires. Check out the full list of forums and sub forums. There's something here for most anything you could need for these trucks. There's the general discussions forum at the top down to engines, drive trains, suspensions, electrical, body and paint and regional events. We even have a classified ads forum and a vendors section.
I can't tell you absolutely which drop kit you need for your truck. It depends a lot on how much spring sag it has already due to age or if it has been dropped some already, etc. I bet if you spend some time down in the suspension section you can find some truck pics with the stance you are looking for and the specs on their drop. 3" front and 5" rear is a very noticeable drop and you shouldn't experience bottoming out under normal use.