I'm sure you could go with a 285/75-16, at least, if you keep the stock offset. I read recently that 2nd Genners have a bigger offset, putting the tires closer to the suspension than stock 1st Gen wheels. One thing to consider is the width of your rim vs tire.
You could also go to a 19. 5, say a 255/75-19. 5 Check out tire heights on the sites that carry 19. 5 wheels and tires. I'm thinking in the neighborhood of 33-34" (?)
Daniel