Anything is possible, but is it a good idea, no.
Look at GM's Olds diesel conversions. They were also a good idea but didn't work too well in the real world.
To do it right, it needs to start out being designed and built as diesel.
And to add a personal opinion, the A series is a great engine family for a gasoline engine, but I think that if one were able to successfully convert one to run on diesel, the stresses would cause one to self destruct.