Upgrade from SAP PI 7.0 to SAP PI 7.4 dual stack

Hi Experts,

Currently we are on SAP PI 7.0 version, with many ccBPM and abap proxy interfaces.

I intend to upgrade this environment keeping ABAP and JAVA stack for ccBPM and IDocs interfaces.

My question is i can do a system copy on the new PI environment and then upgrade it to the SAP PI 7.4 dual stack ?

Regards

Marco