How big do you want to go? I have had decent luck w/add-a-leafs front and rear. I have used various kits in the 2.5-6" range. You have to be careful of rear driveshaft angles on the larger kits. There are a couple of places that offer shackle reversal systems that allow you to get 4" of lift or more w/your stock rear springs. There are also guys using the 52" and 56" Rear springs up front. Gain some flexibility.
Depending on offset and rim width, you might be able to get by w/2.5". The ones I did, I massaged:eyebrows: the fenders w/a Hammer or cut off wheel. Most were rusty IA trucks.