[californiabristol]

Peter Campbell of Spencer Lane-Jones kindly replied:

Dear Greg,

Sounds as though you are nearly there. Presume column and steering arm are
removed. Box should then come out. We do find boxes can corrode into the
mounting on the front cross member. We normally remove the radiator and
secure a long tie-bar to the horizontal surface on the top of the box. This
then provides leverage to "work" the whole box side to side in order to
release it from its housing.

Thanks again Peter!