Kumho AT51 P265/75/16SL 114T tire on a 3/4 ton?

[phatrabbitzz]

I have a 05 'Burb 3/4 ton w/ 6.0L in need of some new tires. As long as I don't tow with it can I use Kumho AT51 P265/75/16SL 114T tire? I noticed several reviews where people mentioned they used this tire on their 2500's. How bad of an idea is this?  

[Super 8]

The 265 is taller than a 245, speedo will be off by 2 mph. If you have 4;10 gear ratio it will be closer to a 3;73 with the taller tire.

[MORSNO]

I'm going with yes, there is an issue running P tires on a 2500HD pickup, the load ratings are not going to be where they should be compared to an E load tire. 

[PrairieGM]

I have those on my half ton, but can't remember the weight capacity on them. I could check in the morning if you want. Otherwise, do they have those AT51's in E range?