Hey guys-
I have been collecting pictures of this for a while:

The Wings and Wheels Book T-54/55 variants has several great pics of this- everything you would need to scratch build it.
The is a picture in Steve Zaloga's T-54/55/62 book showing a T-55 with a mine plow towing one- I want to build the tank in the photo.
But here is my problem- I do not have a single dimension to use to scale the drawing?
Has anyone seen a scale drawing of this or know the wheel diameter etc? Am I missing something obvious that I could use to scale this?

Appreciate any help- Steve