Coil bow is a big problem with lifted Broncos or any type of lifted truck with radius arms. Below is a photo of the fix.
This is a perfect time to ask yourself if you want an extra inch of lift or just want to level the coils.
The shims are for off-road rigs only, no daily drivers. The block should be welded under the coil cup for safety and use grade 8 bolts. They need to have 1.5 degrees per inch of lift cut into the block to level. The top needs an angled shim so the bolts go in correctly. I went for the 1" extra height in the shim to gain a bit more room for my new 38.5" SX's since they slightly rub the body mount from the 38" Radials I ran before them.
Here's a link to a do it yourself write up from performance unlimited on coil shims.
Another way of doing it and more indepth info...
http://performanceun...ilpadshims.html
