So, Mika brought up engine swaps in 71243's Motus thread, so rather than high jack that interesting discussion, I thought I would start a thread about vehicles that have had their engines changed. So lets see 'em.
Here's one of the best I've seen, from Calgary's European Car Meet. The owner's brother races BMW's, and gave him a 2002 race engine to install in his MGA. It's exquisite:
And a close up of the engine bay:
A Lotus Cortina with a small block Ford:
As for the Motus V4 engine, a sweet swap would be into a Bug - Eye Sprite.