If the stock was cut down, it was done quite professionally and a very long time ago. There's no obvious evidence of carpentry work on it which I imagine would be visible to at least some degree. I've had it completely torn down and it appears that the stock was always like it is. Now, I could be completely wrong, but that's the way it appears to me. I do know that most of the K98s I've seen have significantly longer forends going way down the barrel.
Another thing I have found is that the rifle is not number matched. I was hoping it would be, but am not surprised that it isn't. In reality, how many military rifles especially from back in the day never had components replaced at some time in it's active life.
I still am hoping to find out more about this rifle over time and with help. It's now becoming something of a quest for me.