I would say the teeth may be binding against each other ....there appears to be a small clearance between the end of each tooth. How would a person re-profile a gear tooth...many really!Are the gear teeth bottoming on the hubs or are the faces of the teeth binding against each other? If they are bottoming, a slight dressing of the gear tips, with a jewelers file may help. If the gear teeth are binding against one another either offset the bushings as noted or re-profile the gears to mesh properly. If you offset the cam too much, it will affect how the lobes contact the livters, which may change the timing a bit.
If your going to go this far as to have them recut, just make new blanks the correct diameter and cut them?Can the gears be re-done on a gear Hob ? I know a guy that has one...he will be back in a few days. Thanks ....keep the Ideas coming....it all helps. Capt,n