Ok, Sorry I should have included this little tidbit.
I have 275/65/R18 on there now and they are a 32" tire I have a 4x2 so I don't have that great FX4 height.
Im Hoping to go to the Goodyear Wrangler MT/R with Kevlar which has a 35" tire in 285/75/R18. I know I have the clearance in the back. But In the front I only have about an 1.75" of room between the tire and truck when I turn my wheals as far to the left or right as they will go. What do you guys think do I need a Leveling system put in first. If so Who makes one for a 2008 F250 4x2 I cant find one unless its for a 4x4.