Front wheel wobble commonly known as the St Malvern`s dance on Morgans can be related to a number of issues. Later Morgans with wider wheels and thus more grip on the road surface seem devoid of the tendency to "dance." There are many theories relative to front suspension alignment in terms of rake and trail etc.etc.etc. Hopefully the link below might provide you with an insight, or indeed provide you with even more questions... (-:
Good luck.
https://www.gomog.com/BLAIR/tech/frontsuspension/wheelvibration.html
