What is the term for the square bushing the "dog bones" attach to in front, above the radiator? The bushing people rotate 90 degrees for "dog bone flipping."

Is there any way to remove it from the bracket without damage, and reinsert it? There's a ridge around the rubber that fits into a groove in the metal, to keep the bushing from falling out.

Experimenting with repairing/reinforcing with a poly sealant such as 3M Window Weld or Loctite PL S40. People use this stuff for repairing all kinds of mounts. Supposed to clean/degrease the rubber first. If I can't get the rubber out I'll take the whole bracket off and do it that way. Want to do this for different mounts on another make/model car, but the square dog bone bushings on my Grand Prix seemed like an easy first place to start, since they're up top and don't require any disassembly of suspension/drivetrain.