What have you done today with your Austin Seven

[SneezerUSA]

Here in the Colonies I had a similar situation with a 1930 American Austin motor that created a destructive problem at the dynamo. The cam bushing was able to move forward enough to destroy the fiber gear on the back of the dynamo. The repair consisted of centering the locating hole in the bushing with the hole in the crankcase. Use a long drill bit drill both the crankcase and partially into the bushing (block was not removed). Bushing was then removed to complete drilling the hole. Bushing was then put back into position  making certain the holes were lined up. Hole was then tapped for an Allen head bolt of the correct depth. The bushing needed to be removed again to get the new threads  to the bottom of the hole. Again the bushing was reinstalled, aligned and then the bolt was installed to complete the repair. Sealant was applied to the threads.  Repair has been working for the past 350 miles.