http://www.speedwayandroadracehistory.com/melbourne-riverside-dragway.html Bill Tait's Thunderball was a 48 series Holden, powered by a supercharged V12 Merlin engine, Thunderbolt was often seen doing demonstration runs at strips like Calder and the Riverside Dragway, such was the length of the engine that Bill had to drive the monster while sitting in the back seat, The major problem that Bill was faced with was, In the day there was no clutch available to withstand the 2000 hp, so the demo runs were done from a rolling start https://www.youtube.com/watch?v=cGN3bdfk2RM