From his experience with Il verri, Porta began collaborating with an avant-garde Italian movement called Gruppo 63.

While working to develop their ideas, he travelled to the conventions they held in Palermo, Reggio Emilia, "La Sapienza", and Fano.

From 1963 to 1967, Porta was actively involved in the editing of another avant-garde magazine Malebolge from Reggio Emilia.

In these years he also began working in visual poetry, participating in exhibitions in Padua, Rome, Milan, and London.

He contributed as a literary critic for renowned Italian newspapers such as Corriere della Sera and Il Giorno and collaborated on Tuttolibri, Panorama, and L'Europeo.