19-08-2020, 09:02 PM
This photo of my DJ4 may help you visualise what's going on. The bolt you've not undone intrudes into the groove just above the pinch plate in the pic. It is there to stop the distributor rising up in its housing, but if the bolt is a bit too long it will clamp into the base of the groove and stop the distributor turning, which can mess things up if you have manual advance and retard.
Hope this helps.
Hope this helps.