I've been a lurker here for a few months. I'm putting a 5.0 and T5 into my '63 Healey 3000, a project that I've wanted to do since 1968 Probably the most famous of Healey V8 swappers was Max Balchowsky of Ol' Yeller fame. Here's a story about one of his 283 swaps:
http://www.onlinebiographies.com/page11.html Modified Healeys are known as "Nasty Boys" and have a website devoted to them here: modifiedhealeys.org. And to see that the art of stuffing big motors into little British cars is still with us, go here: BritishV8.org.
Rick