Can this be repaired?

Thanks for your comments fellas, much appreciated. I'm going to try and get it welded up, the region where it is cracked is not a structural part of the block and it only needs to be strong enough to retap and hold a fitting. The "work" you see around the holes was done by me to clearance for the direct fittings into the block, so I dont think it's seen work there before...although that plug sure is in tight, as if something extremely strong is keeping it in there.

I'll give it a go anyway, and see whether it can be welded.

One lesson I've learned is never used an ezy out in a situation such as this, all the ezy out succeeded in doing was expanding the plug and causing the crack.