Hi Bob!Dumb question Alan....
I see at the bottom of the tag for that crank "Remarks: Unbalanced"
That seems odd to me.
Not being an engine builder, it would seem to me you would want to start with a balanced crank.
I do realize that you want the whole rotating assembly to be balanced, but how exactly to you do that?
Old guy trying to gain some knowledge here.
I am sure that others can chime in, but you are on the right track with the rotating assembly being balanced since every car and setup will be different even down to the pistons and rods. Just a random and quick search to give an idea, although not everyone balances with the other bits added.
-sent from my Galaxy Note 9