The bracket bolts to the block with just ordinary bolts. I forget what size though. There are two bolts, one that goes in the engine block and one in the bellhousing, if I recall correctly. The bracket itself does NOT pivot. The equalizer bar, which looks like a short piece of round tube with two flat bar arms, does pivot. It rides on little plastic bushings, one on the block/bellhousing bracket, the other on the frame bracket. There are schematic drawings of it floating around, check the Tech section here or the diagram archives on bronco.com or JBG's site. Replace those little plastic bushings while you've got everything apart. BC Broncos has them.
Dusty