I'm looking to swap my 3.73s for a nice set of 4.56s. There is no way in the world that I'm going to attempt it myself, so where is a good place to take my truck to get it done?

Also, has anyone had any work done at Mass Diesel? I'm looking to have them install a full set of gauges, a tranny cooler, and a DP Tuner. I'm just wondering what there reputation is.