Engine Block Structural Integrity

I think the R is rated at 1200hp @ 8500 rpms

I figure the dart iron to be about the same, maybe a little more...

I figure after 1000 hp or so it would get hard to disqinguish how much a block could hold, There is just too many variables...

I've heard the DART rated at 2000+, but I've also heard that nobody has ever split one due to excessive power. Also, damn few people have actually split a stock block even with stupid power, everyone seems to know "a friend of a friend of a friend" who did it... but try to find specific examples and only a few pop up .

Dave