CHEVROLET & GMC (W/Coil Springs): Camber: 1965-71
Determine existing camber, using suitable alignment equipment, and measure distance from top of jounce bumper bracket on lower control arm to bottom surface of frame crossmember. To increase camber, add equal amounts of shims to both upper control arm attaching bolts. To decrease camber, subtract equal amounts of shims from both control arm attaching bolts.
NOTE:
By adding or subtracting equal amounts of shims, camber may be corrected without affecting caster.