There is special tool to do this on a 124 chassis car. I borrowed the tool from my friend. It is a pliers that forces the bushing into place when you squeeze it.

Once the car is on a lift and in the air it's takes less than 5 minutes to pop off the spring clip, push out the old bushing (which maybe be gone), install new bushing, and install a new spring clip. The new spring clips are real easy to install.