What is the cylinder position on a 1998 Ford F-150 4.6L?

The firing order for a 1998 Ford F-150 4.6L V8 engine is 1-5-4-8-6-3-7-2. This isn't directly "cylinder position" in terms of a physical location on the engine, but it's the order in which the cylinders fire. To determine the physical location, you'd need a diagram of the engine. You can usually find a good diagram in a repair manual or online by searching for "1998 Ford F-150 4.6L engine diagram".