How strong is stock Mopar vs Csb?

It was a 2 bolt block in that corvette.
However it hard forged piston stock, but in the end it throw a connection rod and it took with him the whole bottom part.

It did 765hp and 977foot-pounds with a much smaller turbocharger and did 10.862/134mph at 1/4mile.
But he did not dyno it after the changers he did to it, but he said it did very least 800+hp


Yes I have read that it is not enough material for 4 bolts mains in Mopar sb and there also is prone to main cap walk.