Put it in a vise and bend it with a large adjustable spanner or a block of wood and a hammer.
Here's one if you are rich (they also have a RH):
https://www.ebay.com/itm/Nissan-Skyline-R32-R33-R34-GTR-Engine-Lift-Bracket-Left-10006-05U15/123561719856?epid=2248799150&hash=item1cc4da3830:g:tasAAOSwqCRctfPv