Correct initial position for distributor

Is OP's wiring diagram and firing order correct for all 318 engines regardless of use? A neighbor was helping me with tuneup and while swapping in new plugs and wires, said the way he found it did not match the wiring diagram and firing order he has. He did not say what he thinks it is or how it differed. But he rigged it up the same way he found it and it starts and runs.

But if it should be as shown, he and I will go over it again with OP's diagram and see how it differs.....if any......then make a correction if it looks off, and see where it goes.

But first wanted to verify there is only one right way to rig it.