Typically if people are using their terminology correctly, the control arm bushings are in front, and the trailing arm bushings are in back.
Both wear out and if they're original on a 1986, they need to be changed.
You should be able to deflect the front ones (That is, the back of the frotn control arms) with a pry bar between the frame and arm. Watch the brake lines. These are big and heavy duty- takes a good bit of force but if they're worn you will be able to move them.
In case of the rear trailing arm bushings, which connect the rear axle to the trailing arms, they should be totally obvious when they're shot. Again a pry bar, or just lifting up on the axle while the car is raised, will show you how much play is in these bushings. Shouldn't be any. Mine had 1-inch of movement in my 87. That's BAD.
Front ones you can do yourself. The rears require a special tool which has been discussed on here a lot. The tool prevents bending of the ears on the axle when driving in the new bushing.
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Rob Bareiss, New London CT ::: "Roterande Fläkt Och Drivremmar!"