400 m Freestyle, Men
| Competition | 1978 South American Aquatics Championships |
|---|---|
| Venue |
Guayaquil
 ECU
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Diego Quiroga | ECU |
4:09.17 | ||
| 🥈 | José da Fonseca |  BRA |
— | ||
| 🥉 | Ricardo Mattiolli | BRA |
— |