It's worth mentioning the alternator mount bracket is only held to the block with 2 bolts. If you're having an issue you can always drop the bracket then view/understand the problem up close and personal. Also, with the bracket out it would be much easier to adjust the bushing by putting in a vise and/or whacking with a hammer. Even if you end up grinding something down it's nice to have the bracket out for test fitting. Once the bracket slides on/off the alternator with ease, reinstall the bracket then install the alternator

Tim