Yes i did a search in alpendix k and it does not specifically quantify for the 914-6 gt at all. Only 901/911 variants and 356. That said, research on FIA papered gts show that 7s amd.8s are the norm. In speaking with Steve Limbert who owns a real GT he uses 8s and 9s with the rears as minilites that were used in period on the car. Using either 8s or 9s i still use the exact same tire which is required with the groups i run on the east coast as Hoosier TDs.
