I would also look in to blocking the EGR if you follow the Smarty instructions. I purchased the EGR block off plates on line. I believe you can also buy the kit from one of the site sponsors now.
You will also need to down load the ME version from Smarty web site for the deleted DPF and EGR systems.
2008 3/4T, Mega Cab SLT, 6.7L CTD 68RFE,Optix Gauges Pyro, Boost, Trans Temp A Piller mount, Mag-Hytec Trans Pan, Front & Rear Diff cover,Smarty, MBRP Exhaust, Silver, Westin Side Steps, Line-X Bed Liner, Bed Cover, Prodigy BC, 15K Reese hitch and pulling a 11K 5er