I must be marching to a different drummer, DavidB! I far prefer the Australian round lights on the HB Torana to the Viva's rectangular units. Also GMH made good use of blacking out the grilles in both the S and SL trim levels, nicer than the bland Viva's looks. Was it GMH's cost-cutting, or were rectangular lights not yet available on local cars? The first car they appeared on was the VG Valiant of 1970, three years after the introduction of the HB.