This isn't a metallurgy or manufacturing issue IMO.
It's in the tune, mostly.
That said, north of 550whp on our DD, we recommend our sleeve job with Dartons.
Our record on that:
Zero dropped sleeves with a main housing bore straighter than a homophobe.
Splitting isn't the only repercussion of big cylinder pressure, as ovalling can lead to a decently short life. Some folks swear by stock sleeve blocks; ask some of them that really track these cars north of 550whp how often they go through cases.