360 engine vibration
I get your comment and chuckle with it in agreement. If this was a VW flat four or pretty much any other common engine in the UK I would have searched through my spares box and tried another in 5 mins. However I don't have that luxury and if I'd ordered every part I though was causing this issue or wrong with this Dart to date I'd have spent thousands of $$ in parts, shipping and import duties to UK. For example the $68 damper by the time its gets to my door has cost $195.
So I have to take a different approach. If you watched my video I think you'll have grasped even I am at the the point of FFS this has got to be the problem. What threw me was the problem with the damper wasn't the expected deterioration of the rubber and thus wobble/slip of the outer damper part.
If it is a machined defect from when it was manufactured I have to assume this isn't an OEM part that has been on the engine from 1978 and someone has fitted later, probably when installing the V8 in this Dart.