Years ago had a 34 cabro with an 8ba engine. Don't recall firewall or fan issues.
What that link shows is, don't try to install ANY V-8 flathead motor with a 33-34 4-cyl drive shaft and torque tube and expect a bolt-in installation without modifications to the firewall and middle cross-member with either a 33-34 pickup or pass car. By having the V-8 torque tube and selecting the right motor components it is pretty much a bolt-in unless you have the very early 33 front cross-member with the narrow motor mounts.but that link is for a pickup, very different firewall than a passenger car.