Hi @eusebiudapatech,
I believe it is not possible, and even if it is, it's not recommended, as quality statements and reports are generated for each AutoCore release.
You can request the AutoCore package for S32K3 from the following page instead: Design : Product Information : Automotive SW - EB tresos AutoCore. Just as a heads up, that AutoCore package only supports S32K34X derivatives. If you need any other derivative, please contact Elektrobit instead. They should be able to provide it.
Best regards,
Julián