Line up the mounting holes, and use a reliable torque wrench to tighten your new bolts to 30 ft-lbs (33 for the fronts).
Next use a braker-bar (you're gonna' need it) to torque each bolt another 90 degrees (torque-to-yield specs per GM). This is easily measured if you start with your bar at the vertical and pull to the horizontal, or vice-versa.
Now would be a good time to enjoy another frosty brew.
