Tires look like they were taken off a compact car, they look too thin for your truck. Even lowered i think they'd still look a bit out of place, but i could be wrong and they could fit perfectly then. I wouldn't put meatier tires if you lower it, i'd change the rims diameter.

Also

Thank goodness someone quoted the op before he edited out part of the original post, i started to think some of the replies were not making sense lol.