I would love to see the 2.0 liter 5 cylinder 20 valve naturally aspirated version from the Italian domestic market as an engine swap, since it was the base for the 1990:s Super touring car that raced in the BTCC between 1994-1996, and also in the S40 that raced in the BTCC between 1997-99, and kept racing in Sweden untill 2002.
Yes, the Super touring car rules said that you could use any engine you wanted from your parent company, as long as it was a 2 liter n/a engine with a maximum of 6 cylinders so.
So it would be awesome to be able to recreate these engines in detail, to cap the power at around 300 hp and the maximum revs be set 8500 rpm just like the real racing version.
If they won`t add the the real BTCC car, this would be the next best thing to do.
Major 90:s BTCC nut here.