Thinking about buying a new truck. Have a 6.0 now and tow 12 to 15k regular with it. How will a 15 stock compare to a 6.0 tuned towing? Using gearhead heavy tow tunes now. Stock injectors and turbo. I have zero egt issues with this setup just want a new truck and really like the looks of the new ones. Would like to leave it stock for awhile and just drive it. Thanks for any info.