Grind a little clearance into the bracket. We had to do that on some of the motor mount brackets we used on the race cars. Unless you do a massive butcher job, you're not likely to compromise the strength of the bracket with a little trimming.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!