FFCore officially supports Fiery System 10 and higher. Older systems may work based on how the DFE responds to IPP commands. However, printing tho those printers would not be supported by the hotline.
Can Freeflow Core v3 or v4 connect to an EFI System 8 DFE with the IPP enablement patch and use the Core job ticket? The patch states compatibility with Freeflow 6 sp2 for EXP8000 3.0