Leading Holden squads Triple Eight and Erebus Motorsport are waiting on this weekend's Phillip Island to judge their form comparative to teams running Ford Mustangs.After a fast start from Ford's new Mustang, which won the first seven races of the 2019 season, Shane van Gisbergen helped Holden to its first triumph of the year last Sunday at Symmons Plains.The breakthrough win came amid an ongoing parity debate, and followed a mandated centre of gravity change that saw Mustang crews forced to redistribute more than four times as much weight to the roofline than those running Commodores.Top Holden squads, however, are reserving judgement regarding the effect of the CoG changes.Read more - https://www.motorsport.com/v8supercars/news/holden-mustang-phillip-island-comparisons/4367310/