400 m, Men
| Competition | 1984 South American Athletics U18 Championships |
|---|---|
| Venue |
Tarija
 BOL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Arovaldo Silva |  BRA |
51.0 | ||
| 🥈 | Antônio De Oliveira | BRA |
52.7 | ||
| 🥉 | Héctor Villarraga |  COL |
53.7 |