I'll take a gamble and say that this is Bob Johnson's Cobra CSX 2494 at the 1964 USRRC Meadowdale GT Race judging by the straw hat in the background, however I am more than happy to stand corrected.
Via: Club Cobra
For a car that was only produced for five years, the Cobra sure made a lasting impression. 

You can bet the maintenance conditions were a little more civilized down at Mr Norm's.