 Then in 1968 Firth and Hoinville won the first Australian Rally Championship in a Cortina.At the 1968 Hardie-Ferodo 500 at Bathurst, Ford introduced the Ford XT Falcon GT, now powered by the 5.0 L 302 cui V8 engine.However rival manufacturer Holden had introduced the Holden Monaro GTS327 powered by a 5.3 L (327 cui) Chevrolet V8 engine.