For completeness, here are some shots of the firewall and related area in terms of holes.
I have seen a variation in where the vacuum lines penetrate the firewall. The ones here are "by the book" in terms of the Ford drawings available from Osborn. I have seen others that are much closer to the master cylinder.
Pics from 7F01?. VIN and doors gone. Sheetmetal all stamped between Oct 10 and 20.