Re: BOLT head in the Bilge...
Looks pretty urgent to me. Looks like the engine allignment will shift if the bracket swings. It doesnt look to difficult to repair, there may be enough bolt sticking out to get ahold of with a good pair of "visegrips" (no substitutes). If it does not you will have to drill and use an extractor. Bluepoint makes the best one. See a $nap-on dealer