5.3L PCM to 5.7?

I have tried the search but can't seem to find anything. I'm hoping one of you guys could get me going here or at least point me in the right direction.
I have a 99-02 5.7L/4L60E that I have swapped into my 70 Z28. I have a 0411 PCM from an 2002 5.3L truck that I plan to use with this. I need to change my PCM from 5.3 to 5.7. How do I do this? I have had HPT for years and used it a lot, but nothing to this extent. I would appreciate any help or advice.

To start just change the displacement. It's on the first page of the engine tab. It's engine displacement / 8


Beyond that.. just tune away

Are the Injectors the same as what came on the truck?

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Originally Posted by gtstorey

Are the Injectors the same as what came on the truck?

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No, I am using 00 Z28 injectors

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Originally Posted by Alvin

To start just change the displacement. It's on the first page of the engine tab. It's engine displacement / 8


Beyond that.. just tune away

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Ok, Simple enough! I didn't know if this would involve segment swapping and all that. Thank you for your help

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Originally Posted by Stacie

No, I am using 00 Z28 injectors

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Will need to update the injector data in the new PCM.

One more question. What is segment swapping? Or the better question would be, what all situations would you need to use it?

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Originally Posted by Stacie

One more question. What is segment swapping? Or the better question would be, what all situations would you need to use it?

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Most commonly used when you swap from a 4l60 to 4l80 transmission or when changing from a 97-98 ecm to a 99+ ecm where you'll need to segment swap so the fuel sender reads correctly. There are very few instances inbetween that require segment swaps from my personal experience.