using a engine number on a title? never heard of such a thing
Dune,
Can't tell if you are joking.
In case you are serious, it was quite common to use the engine serial number until 1957. There was no year code/indicator in 1957 and later years engine serial numbers, so in those later years an engine serial number was not a good registration identifier.
In earlier years, using an Engine Serial Number obviously caused problems when an engine was replaced.
