Thank you for replying Stan!
What you suggested, is exactly what I finally ended up doing out of frustration. At first, I tried to import the old KDS SDK projects into S32DS, but I kept getting compile errors. Then I just linked to the SDK libraries when creating a new project, and I was able to compile.
Part of my frustration is that the FRDM-KEAZ128 seems to be a stepchild for both the S32DS and MCUxpresso IDEs, and the few code examples that exist, are mostly focused on LIN. I2C is a pretty common interface in automotive embedded applications, perhaps more so than LIN, so I would have appreciated a couple of examples of how to use the SDK in the KEAZ128 Quick Start Guide.
Oh well, time to start experimenting...
Best Regards,
Bill