Manufactured in over 150.000 units between 1972 and 1989, the Fiat X1/9 is fondly remembered for its unique style and excellent handling. But what if I told you that the Fiat X1/9 could, at one point, have become a rally champion? — Buckle up, as this is the untold story of the stillborn Fiat X1/9 Abarth, the mid-engined rally monster that never was. Heart transplant Our story begins in 1974 at the Abarth works of Corso Marche in Turin, where one of the earliest X1/9 produced, one of the press cars used during the…