Sorry, I missed the second page prior to posting above. The serrated ends on the bushing sleeves are to lock them to the crossmember. The idea is that the bushing rubber is what flexes to allow movement. That's why it's important that the car is sitting on the wheels when the control arm fasteners a...

If I remember replacing my bushings correctly (40 years ago?), the steel collars on the ID of the bushings were rusted to the bolts. The ends of the bolts may also be rusted into the crossmember. Get the bushing off the nut end of the bolt, I'm pretty sure I used an oxy/fuel torch. Thin, rusty bushi...