His team, KVG Racing recruited John Hine, to partner Grob in the South African Springbok Trophy Series.
On the same day, 5 April, Grob also won a non-championship race at Nogaro, aboard the same model, Chevron B31.
Grob did visit the podium following his second place in the Britannica 2000, at Brands Hatch in a round of the European 2-litre Sports Car Championship.
[3][6] During the European winter, he travelled to New Zealand for the 1978 Peter Stuyvesant International Formula Pacific Series.
After teaming up with Sphere Drake Racing, he drove their March-Ford 763/77B, managing just one top sixth finish, on the temporary circuit at Wigram.
For rest of the 1978 season, Grob returned to England, joining Ibec Racing Developments Hesketh Team for an assault on the 24 Hours of Le Mans.
Partnered by Guy Edwards, the team's Ibec P6 suffered from mechanical troubles which dropped it to 42nd position after just a few hours.
Despite recovering well from this early setback, in the 19th hour its Cosworth DFV engine failed completely and the Ibec's race was over.