HardCore has a used 5" off of a 5.9 on his truck. Fits almost perfectly on his although I believe his truck is the shorter wheelbase. If you use the 5.9 exhaust it gets rid of all the emmission tuff in the exhaust and looks almost factory. Do a quick sarch and you should ba able to find pics of it. It may have been in the dpf delete by the numbers thread.
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08 5500 4x4 G56 4.44s In the works. SB 3250 dual disc, aux trans, XRT
95 2500 4x4 G56 913 pump, injectors and more....