Big Block Gear Drive On A Slant?

Rusty, it's just a clearance/alignment issue. On a gear drive it may not be critical, but on a chain setup, if the chamfer is too small on the gear compared to the chamfer on the snout. The smaller chamfer on the gear will hit the chamfer on the snout and prevent the gear from seating flat against the flat surfaces on the cam and gear. This can create a misalignment of the crank gear and cam gear binding the timing chain. Again, it may not be an issue on a gear drive. But it can prevent the gear from seating flatly on the two intended mating surfaces.