Where are you feeling the vibrations from, through the steering wheel or the whole front end? If it is coming through the steering wheel it out of balance tires, out of round tire, or a separated tire. If the vibrations aren't coming through the steering wheel it is normally a shock issue, or bad/loose body mounts. Bad/failing steering linkage components cause loose/unresponsive/wander in the steering and poor tire wear, not vibrations. Worn A-arm bushings shouldn't really cause vibrations either, I guess they might if they were completely gone, but you more often hear the front clunk when taking off/stopping quickly.

Since you have manual hubs, the CV's shouldn't be doing anything, w/o the hubs engaged they are static, and should only move w/the up and down motion of the suspension. Even if they were broken, they shouldn't flop around on the highway, unless the hubs aren't releasing, or you have the t-case engaged.

Also, driveline vibrations caused from poor angles, bad u-joints, bent, or out of balance are felt through your seat, not the rest of the rig, and usually go away when you let off the gas.