I have been working on this for the past few months. This is my attempt at the KV ZIK-20 SPG. A concept that only got as far as a wooden model. The design came out of the same program that ultimately lead to the KV-14/SU-152.
The development history can be found here:ZIK-20: Assault Alternative
The goal was to mount a 152mm gun into the hull of a KV-7 since that design path was a failure. It's a questionable design. Most of the ammo was stored in the floor which made it uncomfortable for the crew and the fuel tanks were mounted in the in the front corners of the casemate which would