I would never run a spacer on anything that was being driven rough or hard. I am not fond of spacers in general. They serve a purpose when you have an offset wheel that doesn't match up to the brake calipers I run them on my Terlingua with the street tires/wheels on the rear only because I wanted 10" wheels on the rear for the street (they quit making the wheels for my Terlingua).
Now to answer your question about my truck specifically. My front wheel base is somewhere around a foot wider than the rear (I have never measured but you can see from the pictures the difference in wheel base). Can you imagine the size of spacer and studs I would need?
Talk about looking ******* stupid not to mention that I would sheer the studs right off. It is quite simply easier to drive it with the different wheel bases. On the street, I never feel it. The only time I feel the difference in driving it is on fast sweepers where you want to use the berm for traction or bounce the truck off the berm. I can't do that currently without the back end trying to bounce sideways. At 85-90mph in the sweepers, my truck is just scary. That is also due to my lack of experience. When I first started with the current setup, 70mph was scary.
