Cylinder wall weld??

I’ve done repairs like that between two cylinders and filed it flat with a flat file. Both held up great. The one I repaired I Tig welded it with stainless. The other block was in the car with the pistons in. I packed the cylinder with Kayo wool and fiberglass cloth and a guy stick welded it for me with nickel rod. Hurt it on a Sunday and had it back together for Fridays race.