It would be a 1948 Franks single and the sprocket would be the draw works drive sprocket from the right side.
It would take the place of the front sprocket on the speedy.
With a little shaving of the thickness a bushing and a looooonger chain I should turn around 100 RPM at 64mph.
I’m a Texas hillbilly and I have to use what I have around the house.
It’s holding down the toilet lid right now, I finally got the water pressure under control so I need to use the thing some place else.
Worth