Here's the modified driveshaft. Since the rear part of the 123 driveshaft is fundamentally the same on all models, I altered only the front section. In this case, I used the front piece from the donor 240D and had it shortened to 19.75" measured from the front face of the flex disk 'spider' to the back edge of the fixed hex flats on the shaft.

Attached Thumbnails

 

__________________
Never a dull moment at Berry Hill Farm.