Almost certainly from a 131 Supermirafiori. I got to know that box close up and personal when I put a new clutch in a 1600cc version I bought. About as much wriggle room as Gordon Brown's economy

with the car on front ramps on the driveway. Worth it though as it was the only car I have ever spun on a dry road just by giving it some welly on the right foot. I had the standard 1600cc double overhead cam version but the 2 litre Sport and Abarth versions must have been totaly awsome

: Plus I believe that there were further tuning stages possible !