Except for the Drivers cab there is no detail. Probably in the works from Eduard or someone else.
The kit so far seems to go/fit together rather well with few problems so far. I am building mine using what few pictures are available on the web of the cab interior. Although the instructions call for a flat white interior, the pictures I have seen so far show a colour much like the Soviet interior white seen in the past( a dirty brownish tinge to the white). They probably use diesel or gas as a thinner for the paint before applying. 
They even include a small jig for bending small PE hooks. I glued mine together and have had no problem with the bends so far, except as you can only do one at a time when it made with grooves/holes for four.
So far, a decent kit of an obscure vehicle. I would rate it a 89% out of 100. I only hope I can do it justice on the paint job.