Small block bottom build horsepower limit

What we know the 700+ hp 376 engine isn't just a dyno queen a has raced two years what we don't if it's only been a handful or 100 plus runs down the track so it's ultimate reliability is still a question.

If cryo adds 30-40% added strength does that translate to 30-40% more power handling ability ? Eg.. on top of say 600 hp thats 780-840 hp.