Well, it's cracked. How bad is it?

Lookin good! But.......where that bracket is......isn't that where the long alternator bolt goes? Not a big deal, just bolt it up when you install the alternator. Great job!
You may be right! This is just how it was installed on the 360 that was in the car. The alternator bolt was the hole to the left of the dipstick bracket. I will double check when I swap the alternator to this engine. Thanks again.