 In 1967 Firth won another Bathurst 500 with co-driver Fred Gibson in a 4.7-litre (289 cui) Ford XR Falcon GT, with the Geoghegan brothers finishing in second place after a re-count of the lap scores (The Geoghegan's were actually flagged in first, but they had mistakenly been credited with a lap early in the race when Leo Geoghegan ran out of fuel just after the pits and returned to pit lane via the back of the pits.Firth knew this and successfully protested against his team mates).It was the first time a V8 powered car had won the race.