
The slab of armour on the front glacis, the sharp nosed diff housing, the engine layout and exhausts makes it look like a M4A3 Easy 8 but the turret is wrong for that configuration and I don't know if they ever made VVSS Easy 8s.
The left hand track is a three cleat type but the right hand track and sprocket are certainly from a Grizzly.
It's also got a gun travel clamp front AND rear.
If you go back, see if you can see a serial number on the towing eyes at the front, that should identify it.
Adrian.