Re: new tires
I know you said you did not a M/T. But if you have a chance look at the Toyo Open Country line. I have the M/T and they have been the best tires I have ever owned. They are no louder then any A/T out, and they are also load rated E which is good for towing.
2003 F-350 CCLB 4x4 6 spd man 5.5 Fabtech, 4"turbo stright piped,DP Tuner, hi-idle,40,60,80,100,120, ATS housing wicked wheel, tymar intake,firestone airbags.