1974 Triumph TR6.
Yes, that's a supercharger.
<a href="http://www.flickr.com/photos/dotdoubledot/1394958382/" title="Photo Sharing"><img src="http://farm2.static.flickr.com/1383/1394958382_bd09b1526b_b.jpg" width="560" height="1024" alt="1974 Triumph TR6" /></a>
...and no, it's not mine. Damnit.