Distributor drive gear

[19Fordy]

Scroll down to Post #5 here that shows alignment marks on small cam gear.
https://www.fordbarn.com/forum/showt...1832&showall=1

I can't think of the correct name for it but you might want to consider installing a small set screw at the edge of the circumference of the small cam gear and the cam so as to prevent the cam gear from coming loose and rotating. The set screw also prevents the gear from walking forward or backward. It's like a round keyway with threads.