Is Moroso A-B epoxy good stuff? Anything better?

Well, I ordered some Moroso A-B epoxy today. I will finish porting the head tomorrow and get the spot all clean and ready to apply the putty, hopefully I get it tuesday and I can try it out. Here is my little oops, first pic it is circled, second pic shows the tiny crack, and the third shows how it bulged out into the pushrod side.