Guys, I apologize for any confusion on the Cam markings.
The intent of my post in reply #1 was to show the OP two different photo examples of cam markings and where to look. As these are two seperate 750 cams.
First photo: How an original Honda 750 cam is marked with the “R” number next to the cam sprocket.
Second photo: How aftermarket 750 cams are often marked at the end of the shaft as in my Kenny Harmon “D” example.
As a side note: My K/H “D” is a regrind and was originally a Honda cam marked R8 and does not have the “Made in USA” mark.