on the rear, the spring hangers are all the same. (at last for all 2wd dakotas...haven't really looked at hangers on a 4wd truck) the only thing the factory changed on the rear was the leaf spring and shocks. all you should have to do is change the hangers back to stock.

up front, I don't know that anyone has published actual ride heights because the weight of the trucks were different based on options. I would just aim for what you like and think looks correct after you get the rear back to stock height.

Front was believed to ride 1" lower than the rear as well.