A bit of comparing will tell you: Slide all three of them onto a bare shaft, and lay them on a flat surface with the valve tip on the surface; if they all line up (match up) at the valve tip, the shaft, and the pushrod socket, they are the same, regardless of what they look like. Since the 361 was used in Lincolns, Mercurys, as well as Edsels over a span of years, there may have been a number of design changes in the dies over the years, or from one provider to another; as long as the geometry is correct, and the shaft fits right, I would say they are good to go.