It is unlikely that any technical documentation or three-views were released. It all depends on how seriously this project was taken. It is possible that no three-view drawings were ever produced and that the design bureau moved on to another project, and thus discarding this. If drawings were produced, I do doubt that they would have appeared in anything except Russian writings.
One can speculate what it could have looked like however. It is likely the wing and tailplane were slightly swept. On the interior, it was likely to feature modernised electronics and interiors, as well as quality of life improvements such as increased soundproofing to remove some of the noise from the props. This is complete speculation on my part, however.