Bought a f*cking big spanner yesterday (why does every job on this bloody alfa seem to need me to buy a new tool?):
After much hammer love:
Got the nut off the pinion shaft, and dissassembled the gearbox:
This gearbox is the one that was in the boot of the 75, I think I know now why it was removed, the teeth on the 3rd/4th gear dog ring are ratshit.
From this box I'll be taking: The input shaft and gears 1-3, as well as the selector shaft.
Synchros, dog rings, etc I'll be taking the best ones I can find out of all the boxes