Frankenduster, while you are correct about other people reading this remember one technical detail here. The 360 is an LA motor and the 5.9 is a magnum, technically speaking, though people tend to be flexible about the terminology.

So you are both right.

Also, to address the OP's concerns, early 360's and later 360's have different design balancers, as you have seen. they are interchangeable though.