If all Dodge motors have the same firing order how do you distinguish between say a 318 and 360?

Dodge (and other manufacturers) do *not* use the same firing order across all their engines, regardless of displacement. While some engine families might share firing orders, different engine designs, numbers of cylinders, and even variations within a family will have different firing orders. The 318 and 360 small-block Chryslers, for example, have *different* firing orders.

You distinguish between a 318 and a 360 (or any other engine) by a number of ways, not just the firing order:

* Displacement: The most obvious way. The engine block will be stamped with the displacement (318 cubic inches or 360 cubic inches).

* External Dimensions: While similar, there are subtle differences in overall block size and accessory placement.

* Valve Cover Casting Numbers: These numbers will identify the specific engine.

* Engine ID Tag: Located on the engine block itself, this tag usually provides the complete engine code.

* Number of spark plugs: A 318 has 8, while a 360 has 8 (obviously not a distinguishing factor on its own)

* Bore and Stroke: These internal dimensions differ, although you would need to measure to confirm.

In short, relying solely on firing order to distinguish between engines is unreliable. Multiple factors are needed for accurate identification.