400 m, Men
| Competition | 1970 South American Athletics U20 Championships |
|---|---|
| Venue |
Cali
 COL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | José Báez |  ARG |
49.3 | ||
| 🥈 | Demetrio Pérez |  PER |
50.2 | ||
| 🥉 | Augusto Marchinares | PER |
50.3 |