360/380 hp crate motor RPM range

joes68340s said

I have a 380 hp 360 wondering what max rpm these can take. All stock 750 dp 4 speed.

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MAx rpm and where max hp is are 2 different things. You can spin it to 6200.

Now that I think about it, I wonder how much power in rpm can be gain with ported heads. How much more would the ceiling be raised?