Originally Posted by alfasud.ti
I know about the 166 2.0TS but I have been told that it won't bolt onto the 156/147/GT front subframe. The 166's subframe is different and consequently the gearbox shell is longer.
If you can find a 166 gearbox with the option to return it if you cannot use it (I couldn't) you can try to fit it and let us know if it can be done.
I didnt know about this. Seems too much things to adapt.
But if you have seriously increased your TS power, you can try fitting longer 5th gear. This is not so expensive and available from Novitec or Autodelta. Can help something to higher top speed or economy on long journeys.