I've blown it up too.
No clue on what that thing is on the side
Engine appears to be B&S flat twin
There's no front clutch and it would likely take some doing to put one there.
The blade is an H model with a homemade lift arm.
Yes, those are some weights hanging off the blade. Why? Who knows. I've used weights like that on sliding fire doors in factories. They are slotted to stack on a length of flat bar.
The asking price is still not unreasonable. The blade is worth $150.00, it looks like the front tires are fairly new. The rest of the tractor could be parted out if need be. Essentially, because of this stupid engine swap, the tractor is only good for pushing or pulling. There's a usable tractor there but since you can't blow snow or cut grass, the uses are reduced dramatically.
Put a cab on it and weight it up. Make a dedicated plow tractor. Other than that, part it out. End up with a free blade, new tires etc. No matter what, it would be hard to go wrong.