Engine question

[dodge trucker]

this is not on a Cub, though it could be. It does have to do with a Kohler K341 though.

I have several tractors, not all of them Cubs. my others are Ariens and early 70's New Holland.

Anyways I found a deal on another Ariens GT16, with a snow blower, deck and a set of wheel weights. I am buying it solely for these items, because snow blowers alone for these machines go for 3x what I am getting the whole unit for.... but I still gotta go into Wisconsin (just barely) for it...

Here is the catch... the garage this thing was in caught fire, the tires are melted, the fiberglass hood is destroyed, but strangely the snow blower looks unscathed. the deck was not in the fire zone. I may try and see if "anything" might be salvageable from this tractor itself, but aside from the engine I am expecting the tractor to basically be dead weight to take to scrap.
The tractor was not the source of the fire, but more so "collateral damage" as it just happened to be sitting in there when the fire happened.

So now you have the back story, here is my issue.
Supposedly, the engine ran great before the fire, but now seems stuck. I am hoping that it is something (like) a stuck melted PTO clutch or something along that line, causing the engine to be stuck. Won't know til I get into it.
but for what K341s go for these days I AM keeping that.
What are the chances, that the internals weren't hurt? I am hoping that I can pull the engine, take it down to the short block, replace gaskets and seals and have a good engine again. I expect to have to replace the starter, stator, tune up parts etc, plus the standard decarbon, tune up, carb rebuild etc... but got my fingers crossed I won't have to get into a full blown rebuild on it. my biggest worry (I think) is not knowing whether it has an iron or plastic governor gear.... whether the Kohler's cast iron block was enough to protect/ shield that from damage?