Best suspenion upgrades for 69 1/2 ton panel

[chris mc bride]

I working on a restoration/upgrade project for a 69 panel 1/2 ton truck.I figure to lower front 3 inches and rear 2 to 2 1/2.I figure to step the sway bars up in size,use poly bushings thru out. Wondering what else would help this thing handle better.Don't figure to make it handle like my Vette or z/28 but better would be great.
I will also be transferring all weight lower and back when possible.Plus new shocks forgot about that.Will be using spindles for drop up front and srpings in the rear to drop it if that makes a differance.
Ive found disc brake conversions also ,that i plan to use as soon as I can pickup some more extra cash flow.The old lady says We are going to be moving into one if I keep spending.