use my previous machine IDs with a new Big Sur installation?

I've got a running Catalina system I want to move to Big Sur by replacing the EFI folder with one set up for OC and Big Sur.

Everything here says I need iMac19,1, and a new serial number and UUID and other machine fingerprints to install Big Sur.
That will mess up some pretty expensive software if it thinks it's on a new machine. Can I copy my serial number, my UUID, my Machine ID (iMacPro1,1) into the BS config.plist and still boot?

I'm hoping to take my newly-configured OC EFI folder...

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Author: kentval