Cracked Block

That stitching i have done on a alu head in the combustion chamber between the intake and exhaust valve.
on a jap head. worked at a wrecking yard, and my boss had me do this only with alu screws and then peen the **** out of them. I thought it was a real shitty thing to do(because the customer never knew that it was repaired only that it was Quote USED) but it held up and did it several more time. It worked every time! Never thought it would have a snowball in hell change.......but it worked.
This was for a hairline crack that only pressurized the cooling system when under a load.

Yours look like a gaping hole......Don't think the stitching process will work for you..... but what do i know, never tried it on cast iron.........