Editing Repco (section)

===Repco Leyland===
After the initial success of the Repco Holden engine, Australian racer John McCormack began looking for a cheaper and lighter alternative to the Holden and Chevrolet engines. In 1974, he and former [[Repco Brabham]] engineer [[Phil Irving]] found what they were looking for in the 4.4L alloy block [[Rover V8 engine]] that powered the [[Leyland P76]]. In its standard form, the {{cvt|4414|cc|L|1|order=flip}} engine produced approximately {{cvt|200|bhp|kW PS|0}}. After being highly modified by Repco to be upsized to {{cvt|4931|cc|L|1|order=flip}}, and after much development over three years, the Repco-Leyland V8 eventually produced around {{cvt|470|bhp|kW PS|0}} at its peak in 1977, which although a fair bit less than the power on offer from the Repco Holden and Chevrolet engines, was offset by the fact that it weighed only {{cvt|160|kg|lb|1}} compared to the cast iron blocks of the Holden ({{cvt|220|kg|lb|1}}) and the Chevrolet ({{cvt|231.5|kg|lb|1}}) engines.

In 1976, McCormack had purchased the [[1973 British Grand Prix|1973]] [[British Grand Prix]] winning [[McLaren M23]] (Chassis No. M23-2)<ref>[https://primotipo.com/2014/07/24/macs-mclaren-peter-revson-dave-charlton-and-john-mccormacks-mclaren-m232/ Mac’s McLaren: Peter Revson, Dave Charlton and John McCormack’s McLaren M23/2…]</ref> from South African racer [[Dave Charlton]] and modified the car for Formula 5000 racing (the car was bought with all spares, but no engine). He chose the Repco Leyland primarily because its weight was comparable to the {{cvt|168|kg|lb|1}} [[Cosworth DFV]] that the car had originally been designed to use and thus wouldn't upset the more finely tuned handling of the former [[Formula One]] race winner as would the heavier Holden or Chev V8s.

While McCormack would win the [[1977 Australian Drivers' Championship]] with the Repco-Leyland, the engine was known to be on the brittle side and lacked the reliability of the Chevrolet and Holden V8s.

The list of Repco-Leyland's Formula 5000 engine race, championship and series results includes:
* [[1976 Australian Drivers' Championship]] – 3rd (1 win @ [[Calder Park Raceway|Calder Park]])
* [[1977 Rothmans International Series]] – 9th
* [[1977 Australian Drivers' Championship]] – 1st (1 win @ [[Surfers Paradise International Raceway|Surfers Paradise]])
* [[1977 Australian Grand Prix]] @ [[Oran Park Raceway|Oran Park]] – DNF (engine)
* [[1978 Australian Drivers' Championship]] – 2nd (1 win @ Oran Park)
* [[1978 Australian Grand Prix]] @ [[Sandown Raceway]] – DNF (engine) – <small>''Pole Position''</small>
* [[1979 Rothmans International Series]] – 9th
* [[1979 Australian Grand Prix]] @ [[Wanneroo Park]] – DNF (gearbox)