Has there ever been a 7–3 in the Primera Argentina?

Yes, 22 times.

The first time: May 25, 1905, Estudiantes de Buenos Aires beat Barracas Athletic (Estudiantes de Buenos Aires 7–3 Barracas Athletic).

The last time: April 15, 1981, Ferro Carril Oeste beat Instituto (Instituto 3–7 Ferro Carril Oeste), 45 years ago.

Home wins: 15. Away wins: 7.

Nearby scores

1. 8–2 16 times
2. 8–3 4 times
3. 8–4 2 times
4. 7–2 43 times
5. 7–3 22 times
6. 7–4 5 times
7. 6–2 115 times
8. 6–3 58 times
9. 6–4 18 times

All games

1. April 15, 1981 Instituto 3–7 Ferro Carril Oeste
2. October 19, 1975 Talleres 7–3 Atlanta
3. November 11, 1962 Racing Club 7–3 Chacarita Juniors
4. December 5, 1958 Central Córdoba (Rosario) 7–3 Lanús
5. June 28, 1953 Gimnasia y Esgrima La Plata 7–3 Lanús
6. June 5, 1949 Chacarita Juniors 7–3 Banfield
7. November 4, 1945 Atlanta 7–3 Gimnasia y Esgrima La Plata
8. November 26, 1944 Platense 7–3 Rosario Central
9. October 24, 1943 Atlanta 7–3 Banfield
10. October 10, 1943 Atlanta 3–7 Independiente
11. May 24, 1942 Tigre 3–7 Newell's Old Boys
12. May 10, 1942 Estudiantes de La Plata 7–3 Platense
13. May 12, 1940 Banfield 7–3 Atlanta
14. December 18, 1938 Gimnasia y Esgrima La Plata 7–3 Huracán
15. October 2, 1938 Gimnasia y Esgrima La Plata 7–3 Lanús
16. December 8, 1937 Boca Juniors 7–3 Quilmes
17. May 23, 1937 Argentinos Juniors 3–7 Independiente
18. November 11, 1936 Chacarita Juniors 3–7 Independiente
19. November 29, 1931 San Fernando 3–7 El Porvenir
20. November 1, 1911 Estudiantes de Buenos Aires 3–7 San Isidro
21. August 8, 1909 Quilmes 7–3 Reformer
22. May 25, 1905 Estudiantes de Buenos Aires 7–3 Barracas Athletic