agree , but Brazing is an acceptable way to repair cast iron.I think its properties are stronger than cast iron.
Brazing is very soft and has a different expansion rate than either cast grey iron or ductile iron
I had my first 400 block brazed up on the deck between #4 and #6 cylinders due to it blowing a head gasket before I bought it, I couldn't find another block so I had it fixed and had to put two sleeves in those cylinder to make the head gaskets and ring seal right
I had to put two sleeves in #1 and #7 cylinders also due to rust pitting being to deep to seal up at 4.375 bore size, that block was not a good pick to build
it did make a lot of power and lived as long as I had it
