Specific Question on F350's

4x4ord wrote:
The camper package is of no significance on the diesel F350 because it already has the heavy front axle and rear stabalizer. The 20" tires are rated for more weight than are the 18" tires. (3750 lbs per tire for the 20" and 3640 for the 18" tires) The 20" rims will give you a little more "stability" due to their lower profile. 20 wheels also provide for a little lower rpm at highway speed if you are getting the 3:55 rear end. This lower rpm will equate to a little better fuel economy. If you want the best fuel economy you need to go to the 3:31 rear axle ratio which will require you get 18" wheels.

I made a mistake here. The 4x4 F350's front axle weight rating range from 4400 lbs to 6000 lbs depending on wheel base cab configuration and engine. The F350 diesel 4x4 crew cab has a normal computer selected front axle weight rating of 5600 lbs regardless of tire size. Selecting camper package should up grade the front axle rating 1 level higher than the normal computer selected axle which would be 6000 lbs which is the same springs as the snow plow option.