What is the round part that is on the front of the cam which the fuel pump arm rides? I'm needing to get one and need to know what it is called so I can search for it.

CarPartsManual.com

Huge help, than you @Yarb

Now I need to find one! I'm looking for part #13015-21002, the part is called SERVICE FILE CAM-FUEL PUMP.

It is #9 in this diagram: https://www.carpartsmanual.com/datsun/Z-1969-1978/engine-240z-260z/camshaft-valve-mechanism/9

There's a couple on eBay that might work. Probably all the same.

https://www.ebay.com/sch/i.html?_nkw=datsun+eccentric&_sacat=0&_from=R40&_trksid=p2332490.m570.l1313

@texasz , I've got a used one complete with the bolt if still in need.

Bonzi Lon

Parts are on the way.

Bonzi Lon

This is what is so fantastic about this site and the rare types of parts that are needed and pretty much unavailable to purchase new. Thanks to everyone for helping to keep these Ladies on the road!