Has there ever been a 7–4 in the Brasileirão?

Yes, 1 time.

The only time: October 22, 2003, Santos beat Bahia (Bahia 4–7 Santos).

Nearby scores

1. 8–3 Never
2. 8–4 Never
3. 8–5 Never
4. 7–3 Never
5. 7–4 1 time
6. 7–5 1 time
7. 6–3 7 times
8. 6–4 5 times
9. 6–5 Never