I like you, wanted to do the 1937 version simply for the rarity of it and the joy of having a tank with a gun on it.
I see it looks like you are taking the safer approach and using the existing carrier drive layout?
I am making a series of very significant changes so that the drive sprocket is at the front.
I have gutted what was left of my "Log Skidder" and will attempt to make it run the opposite direction. (Running the original transmission in reverse)
Driver controls and all linkages will be rebuilt and positioned on the left of the engine facing over the rear drive axle. Turret will be directly behind it as per the existing examples in Russia.
I spent a few hours this week cutting off the firewall and extra bits added over the years. Next week I will sandblast the interior and get it primed for winter install of the drive train.
Engine will be offset to the right and connected with a custom driveshaft to the original transmission.
A huge project that I expect will take me all winter.
Pictures to follow as I forget to take them as I was cutting. Have before but no after yet.
Jon