Ford cylinders are numbered front to back starting with the passenger front cylinder as one. The passenger rear cylinder is 4. The driver front cylinder is 5 and the driver rear cylinder is 8.
Not sure why you're asking . . . is it because a set of freshly machined ones have been marked and you don't know where they go . . . or?
The reason I ask is that some machine shops will mark the numbers in the order of the cylinders (front to back). So, it is important to know what the machine shop did.