340 CRANK?

Quote from above:
"On my other 2 stock 340 forged cranks - 1 has the notch in the flywheel flange, like the above picture shows, and the other one has no notch. Any ideas on why the difference?

AJ/FormS- Do any of your forged cranks not have a notch?"

I am looking at a "Crankshaft Quote/Work Order Form" and under the section "Flange" there is a question: "Scalloped Yes or No". Does anyone know what a "scalloped flange" would be? Thank you.