Hi I have a Gravely convertable 7.6 electric start 2 wheel tractor, not entirely vintage but not too many in the UK
I have made toolbar fittings for front or rear cultivation but have not used the m/c to do any work yet
It is automatic so very easy to use and zero turn also.
I have a friend who buys and sells Gravely mowers and he is very knowledgeable of the engines and transmissions.
I have never seen any Graveley,s on show anywhere