Logical reason: Car stolen, taken for joy ride, and rod started knocking. Pulled blower and intake to sell and make cash after ditching rest of car. I hope you're positive in your "belief" that the engine is ok. If it were my project and I wasn't sure about the engine, I'd at least do compression and leak down tests to be sure as I could before I spend massive $$ to build up a bad engine.
What's the history of the engine? Did it previously have aftermarket pullies and a tune? Does it even have a PCM installed anymore?