Так ты ведь прочитал, что там и ответ есть?
Bought in Italy, from Bacci.
bacciromano - dot - com
In this file bacciromano - dot - com/files/Tabvel.pdf , page 101, second chart of the page, you can see the three different choiches they have for the 75. Ours is the longest one, supposed to speed 186,40 km/h at 7.000 rmp (but it's hard to get 7.000 rpm out of the 8v Twin Spark unless with new camshafts).
Cost is around € 2.000 for the whole 'box, w/o synchro (works with the standard ones).