Mine stock towing would hit 1350 pre turbo, so that being said I would think it could run there all day long, there are lots of opinions on this subject so I'll throw mine out there too and these are based on what others have told me, I try not to exceed 1500 for more than a few seconds, I know some folks that make this same statement but use the number 1800 so I guess as long as we all back off just before parts start turning molten it'll all be good.
Oh yeah, almost forgot welcome to the good ol TDR, lots of info here, enjoy.