IRS alignment setting for wide rear tires

[Bruce2]

Originally Posted by Michael Ghia

You can adjust the camber on the rear suspension by simply loosening the 3 bolts which connect the spring plate to the rear arm and move the arm up and down. Up will give you move negative camber and down will give you more positive camber. Remember just the 3 bolts which hold the spring plate to the arm.
MG

You've got it backwards Mike. Tilting the rear of the trailing arm up gives positive camber. Down gives negative.