FYI, the 16V A1, 16V A2, and all 4-cyl A3 each had the rod-shifter 020 box with the larger diameter input shaft. Thus, a box from a 4-cyl A3 would work just fine on your 16V street car with the stock clutch disk, and give it longer legs (ratio-wise). Using an 8V A2 box with the smaller diam input spline will also work if you use the 8V clutch disk.