When I put the 2500 Ram 17" alloys on my '93Sub I had to use a 5/16" spacer to get the wheels to fit over the front suspension, this after massaging the upper A-arms quite a bit. This is on a 3/4 ton 4WD Suburban that is plenty heavy on the front end. I have had absolutely no problems with the spacers, about 25K miles so far.

If you are worried about spacers get together with Bill Rolik's website.

R.