[Blue68]

Your lower a-arm bushings are going to be steel. IF you can make them move then they are definately worn out. I say if because you have several hundred pounds of pressure on the control arm from the spring. Best way to know for sure is the remove the lower ball joint and take the pressure off the spring. Then, if it is worn, it will be sloppy and easily seen.

Something to consider, but not the safest approach, would be to put blocks in front of and behind the tire and have someone slowly move the truck back and forth and watch for movement. Another idea might be to take a floor jack and place it on the a-arm between the spring pocket and the bushing and see if any play occurs. Don't try to lift the truck here, just see if the control arm moves at the bushing. Any visible play means it needs to be replaced. I've replaced these before, and it's not a big deal. Rates up there with changing lower ball joints. Catch is having a cheater pipe and large socket to break them loose. You buy the entire bar which gets you both bushings (front and back) per side.