I used to make a sketch as to where the distributer arm was before removing the dynamo and just re-engage in same position (without letting the engine turn) - easier these days with cameras on your phone.
From memory, Don't forget that you may need a long box spanner to undo the (1/4" ??) dynamo bolts from the timing gear housing.
Also be prepared to replace the small insulating bushes that hold the brush support arms - they sometimes get very fragile in old age!
From memory, Don't forget that you may need a long box spanner to undo the (1/4" ??) dynamo bolts from the timing gear housing.
Also be prepared to replace the small insulating bushes that hold the brush support arms - they sometimes get very fragile in old age!