It's a bit off topic but that cam dowel isn't what transfers drive torque through the timing set -- it's only there for locating purposes. The friction between the cam face and timing gear, when the cam bolt is torqued correctly, is what prevents slip and subsequent shearing of that pin. A grade 8 7/16 UNC bolt (what the single bolt cam uses IIRC) can safely produce 9,568 pounds of clamping load.