Small Block & Big Block Chevy Specific - When are long slot rockers needed?

I'm putting in a .540 lift cam in the 454 I got to go in my boat. After what lift do you need to change out the stock rockers?

if you are unsure and want to be safe go with a lower lift and use 1.6 rockers to eliminate any questions

The only 1.6s I came across so far were Crower @ $430. I already have the cam sitting in my garage.

Stock 1.7 Rockers clear .540 fine on a big block.

Cool. I haven't ever had a big block before so they're still kinda new to me because I haven't ever had to know much about them before.

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Ran a .575 hydrulic about 20 years ago with stock rockers. No problems, but the used stock springs didn't last very long, but nothing hit. Good luck.

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Sound good. I've got some new Crane springs I bought with the cam. Supposed to be good to .560 or so.