Yea I don't think the big trucks fenders are much if any wider, mainly taller with bigger wheel wells I know for a fact the grill is the same width cause I got half-ton splash bars in my 2 ton, but I had to change the vertical posts to make it tall enough.
If your good at body work you can cut the fenders and make them wider. I've seen guys do this before, take a look in the gallery, I think that's where I saw it.
