Hi Ray, I believe the Catalina crash was late 1965, circa November, that destroyed his first Mustang. He then had another shunt in early 1966 in his Elfin, in which he sustained some injuries and which put him out of racing for a time. I know he didn't contest the 1966 ATCC, which was held at Bathurst. There were really only two contenders at that event; Geoghegan and Beechey.
The Mustang pictured above is a '67, but this photo would be from 1968, after it'd undergone several modifications, including the front and rear spoilers, flared wheel arches, and quite severe lowering of the ride height. It sat significantly lower than most other sedans in 1968.