Raising 5'er for Ram 2500

Thanks to all who have responded. It does in fact measure 59in on level pavement to the top of the tailgate. The 5er level measures 60.5in level under the pole barn. So as you can see, thats 1.5 inches. Im curious if raising the RV the 2-3 inches I'm thinking about is even going to be enough after doing more looking and measuring today. The lippert correct track looks interesting, and the sub frame idea mentioned that I had read about seems to be the best 2 ideas so far. Just don't know of anywhere around here to get that done, how much it will cost, etc. Anybody ever had the sub frame done that wouldn't mind giving me an idea of cost? What about blocks (welded in place of course) between the axle and springs? Some don't recommend this due to lateral forces which I understand, but if they we're welded in place would that not work?