GD, they were still pretty competitive in the early 60's, my fathers Tiger 100 won the 7 hour race at Musswellbrook in 62, later the engine was twingled and was about 8 laps in the lead late in the first ever 6 hour at Nepean, 68?, before splitting the oil tank.
They were a good thing and I reckon it should go to the top of the list Mark.