Ok, so I figured out what the engine is, and I have the side cover taken off. I think it's saveable, there aren't any apparent cracks or damage on the inside of the engine, and the head looks good too. My only problem is this. I can go to harbor freight 3 miles from my house and pick up a predator for like 130$. OR, I can try to save this engine, which doesn't have any performance upgrades, but can take an absolute beating compared to the predator. But I really like this engine, but I don't want to pour a bunch of money into something I'm not 100% sure will work. It needs a new gasket set which is around 60$ on eBay. It needs a new carburetor which is around 20$ on eBay, it needs a new exhaust which is around 50$ on eBay, and needs a new starter pulley, flywheel, spark plug, cooling fan, camshaft bolt, air filter, all would come around 150$ more. So I don't think there's any reason I should try to keep working on the engine besides the fact that once its rebuilt it'll last longer on my go-kart than a predator would (hypothetically)