I got the 2.5" in front....
Way, way better than stock springs, but also have Rancho 9000's for shocks. I would think that there should be plenty of room between the bump stops and spring, but you might check there. Mine was hitting on every little bump, would just about jar your teeth loose.
First Gen 4x4 Dodge's really weren't known for having a very, ummmmm, plush ride. Every one I have ever had left something to be desired as far as ride quality. I think in the case of an empty (unloaded) CTD equipped 3/4 or 1 ton, the front is way heavier than the rear, which amounts to a bit of uneven movement in the suspension. On the trucks I have owned, throwing 500-600 pounds in the bed would generally make for a better ride.
SkyJackers Hydro shocks are supposed to be pretty high quality, but I prefer the adjustability of the Rancho 9000's. I saw recently there was another brand making a 6 position adjustable shock now, but I don't recall the name. Hope it helps.