I installed the Tough Country 5inch on my 04 DC about 5 months ago. It was about a 10 hour job start to finish with lunch dinner and BSing going on. I've been very happy with it. I plan to get rid of the rear block but the front set up is solid and leaves you a pretty good ride. I had a 3inch spacer lift and rubbed on my 33's a little to often so the extra 2 inches gets me well clear of my tires but not too high. I would also suggest to re-gear at the same time. I changed out my 4:10's to 4:56's, made a world of difference! Good luck in your choice.