Crack In The Motor Block

New to the forum and just purchased my first blaster project. I was told that it would need a new top end so I went ahead and started to strip the motor. After removing the cylinder jug, I noticed this crack on the side of the bolt screw . Thought the top end rebuild was going to be a pretty straight forward process but now I am stuck with this issue.

Is there a way to fix this without having issues in the future or would it be easier to just buy a new motor?

Any input would help.

Thanks!

Thanks for the input. I may try to JB weld the small crack for now and see how it'll hold up.