The bracket is cast iron- - - -the sleeve is steel. A quick cut with an acetylene torch will blow a slot in the steel bushing without damaging the bracket. 30 seconds and it's out.
Jerry
I've used that method to cut rusted nuts off of bolts. Usually the threads of the bolt were undamaged and the bolts could be reused, but if overheated, the bolt would have a gouge in it. I'd be hesitant to use that method on the sleeve. If you damaged the bracket you'd be trying to find a replacement. Using a ball joint press is a much safer method.
