I ended up grinding off a little of the bushings and using washers under the clamps. It seems to work just fine. I used some rubber grease (designed for brake caliper pins) on the bushings.
I took for a test drive and there is a noticeable difference in how it handles. A lot less body roll on corners, and seems to be more controlled hitting bumps. I can't believe I waited 15 years to do this! Now I just need an overdrive transmission and some power disc brakes.
Here's a picture of the truck, because I know everybody like pictures.
