Today I modified the front drive shafts slightly (from rear of Sierra 1.6 CVH originally) so the outer CV joints (from 4×4 Sierra front) will lock properly to them. Also inner CV joint boots are changed, but the joints itself are untouched:

At the photo you also can see the shorter drive shaft from Ford Ka which serves as front cardan axle. The flange at the right end needs still holes and threads for its fastening bolts.

Probably next I will mount the front drive shafts, bearings, wheel hub and wheel mounts together. And if I have time I will drill the holes to both flanges which are needed to join Sierra and Ka parts together (front & rear).