Mancini was a tough guy. Tough enough to beat a guy 5 inches taller and, by fight time, 3 weight classes larger? Don't know. With same day weigh ins and Corrales making 135, there would be no fight because Corrales would pass out during the introductions.
Prime Mancini gave a much better, and taller fighter pure hell for 14rds against A.Arguello..... I see no reason he wouldn't defeat Corrales...... Stops him in 10rds.