FL,
Can one get enough fuel endurance to make it across the wet bits? With the right weather and winds....no reason a 44 should not make it across mechanically. The drawback is the North Atlantic can be a very cold, lonely place should you give up flying across and have to do it by rubber boat.
What is the longest leg....bit over 600nm is it?
An old pprune thread about the topic of ferrying small aircraft across the pond...
http://www.geocities.com/profemery/aviation/ferry.html