For terrific photography, look through Autoblog

For a couple other photos of this twin boom, 1951 Bissiluro, world record speed holder at one time of the 2000cc class : http://zelastchancegaragedu78.blogspot.com/2009/09/twin-boom.html
http://www.autoblog.com/photos/2007-goodwood-festival-of-speed-other-stuff/289984/