In December 1984 Costanzo accepted an offer from that year's Australian Sports Car Champion Bap Romano to co-drive the Romano WE84 Cosworth in the 1984 Sandown 1000 as part of the 1984 World Endurance Championship, the first FIA World Championship event held in Australia.
1984 | 1984 Winter Olympics | 1984 Summer Olympics | 1984 in music | ATP World Tour Masters 1000 | Canadian federal election, 1984 | The Karate Kid (1984 film) | 1984 in baseball | 1984–85 in English football | Canoeing at the 1984 Summer Olympics | 1984 in film | United States presidential election, 1984 | North American Soccer League (1968–1984) | UEFA Euro 1984 | Basketball at the 1984 Summer Olympics | Baja 1000 | 1984 in television | Sandown | Athletics at the 1984 Summer Olympics | 1984 Republican National Convention | New Zealand general election, 1984 | UK miners' strike (1984–1985) | North American Soccer League (1968-1984) | Bathurst 1000 | 1984 Summer Paralympics | 1984 Northern Sumatra earthquake | 1984 in video gaming | 1984 Democratic National Convention | Volleyball at the 1984 Summer Olympics | United States House of Representatives elections, 1984 |