Back in the day my buddy ran low eleven's with a stroked 557 block build and mid tens on spray. It was raced for several reasons and never failed.
I've seen the "Google" pictures of blown up 557 blocks and all I can say is "engines fail for a reason". More than likely something else was going on before the 557 block imploded.
FWIW.... Butler rates the 557 block good for a 600 horsepower limit.
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