400 m, Men
| Competition | 1977 South American Athletics U18 Championships |
|---|---|
| Venue |
Rio de Janeiro
 BRA
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | José Martínez |  VEN |
50.66 | ||
| 🥈 | José Obispo | VEN |
50.76 | ||
| 🥉 | Daniel Orlando |  ARG |
51.20 |