front right wheel wobble on 87

[special-K]

When an axle u-joint goes there`s a good chance you`re looking at egged-out axle yokes...i-2 shaft replacement,AND that u-joint.I also always replace the spindle bearings "everytime".The drive axle has no effect on anything when it 2wd and even then,nothing to do with wheel location/slop issues.
Normally I`d say it`s the ball joints but if it`s only when braking I lean towards wheel bearings.Although,both these problems causing wheel hop are usually halted when hitting the brakes,which stabilizes the whole deal...not the opposite.The wheel bearing would have been out for the rotor turn,which is the time for cleaning/inspecting/re-pack.Look for movement between the knuckle and the axle housing for ball-joint wear and look for movement of the hub on the knuckle for bearing wear.