At the 1968 Hardie-Ferodo 500, McPhee drove a Holden Monaro GTS327 painted yellow with black stripes with the number 13. His co-driver, who drove just one lap that day, was Barry Mulholland. McPhee would later claim in Australian Muscle Car magazine that an attempt to sabotage his Monaro was made the night before the race. As the race cars were road registered in that era, McPhee had driven the car back to his motel in Bathurst for the night. When he came out on race morning to fill the car with petrol, a number of tree leaves floated to the top of the filler. Luckily this was found before any potential damage could have put the car out of the race. The Monaro, supplied and sponsored by Wyong Motors, ran the race on one set of used, almost bald tyres, McPhee believing that they were faster than tyres with full tread. Towards the end of the race track marshals around the Mount Panorama Circuit were reporting seeing sparks from the Monaro's Michelin tyres as they had worn down to their steel belts after almost 500 miles of racing. McPhee entered the 1969 Hardie-Ferodo 500 originally intending to run one of the new HT Monaro GTS350's, but when he received no help from Holden to do so he instead drove a privately entered XW Ford Falcon GTHO. Driving with Mulholland who again only drove one lap, the McPhee Falcon finished a close second at Bathurst to the Colin Bond/Tony Roberts HDT Monaro GTS350. Many, including HDT boss Harry Firth, believe that if not for an early pit stop to change a tyre after a clash with another car resulting in a late stop for fuel as they were out of sequence, McPhee and Mulholland would have won in '69 and made it back to back Bathurst 500's. McPhee joined the Ford works team in 1970, driving in the South Pacific Touring Series early in the year, and was given his own Phase II XW GTHO to drive solo at the 1970 Hardie-Ferodo 500. Even though his car was still running near perfectly at the end of the 500 miles, McPhee finished second after following team orders not to pass his teammate, lead driver Allan Moffat. As well as the 1968 outright win in the Holden Monaro, McPhee finished on the podium at Bathurst in 1963 in a Ford Cortina Mk.I GT, 1965 in a Ford Cortina Mk.I GT500, 1966 in a Morris Cooper S, 1969 in a XW Ford Falcon GTHO Phase I and 1970 in a XW Ford Falcon GTHOPhase II. McPhee also claimed the 1968 Hardie-Ferodo 500 pole position giving him the dual honour of being the first "Bathurst 500" race winner for Holden and the first "Bathurst 500" pole position winner for Holden.
