On a previous Dodge, I installed 3.5" front and 5.5" Superlift softride springs. I was able to do away with the rear block and maintain a level ride with the service body. I used the Wrangler RT-II 36" bias ply tires...they were great in the dirt, but sucked on the pavement.
I would like to do this again on my Ramcharger, doing away with the stock rear spring and stacked blocks. The front springs are really stiff 4" Trail Ready pieces from the early 90's and provide no real flex at all. The truck was kitted out by some dealer in Oregon in 1989; the front sway bar is still connected with the stock height links, and the rear also used a Hellwig swaybar. The Hellwig links are stretch considerably, bent, and I'm surprised they didn't break.