Yes, this is the second of Alec Mildren's GTAs and the first RHD one that Kevin Bartlett took to 4th in the 1967 ATCC at Lakeside. This must be at least 1968 given that there is a Datsun 1600 in the pits.
This GTA later passed to John French who repainted it red with sponsorship from Clive Nolan Motors (John's father-in-law) and then Brian Foley who turned it into a sports sedan in Chesterfield colours. He crashed it badly in 1973 at Oran park breaking a leg and then the GTA headed west where it was originally restored in Chesterfield colours before returning to New South Wales where the current owner carried out an expensive restoration back to its original Alec Mildren Racing white livery as seen here. John French was reunited with the GTA at Lakeside in 2011.