Ok, I may have to expand on my idea of "multipurpose" to include a transom.
:-)
Best ever viral Ice Sled Antique mode of transportation is cool boat motor. - YouTube
https://m.youtube.com/watch?v=eTB9ZSTTmX4
And if light enough, it could double as a tailgate ramp rather than having it sit unused most of the time.
How to build a truck ramp... cheap - General Discussion - DOOTalk Forums
http://www.dootalk.com/forums/topic/...ck-ramp-cheap/