327's were a good engine, they'll rev like a banshee with the right valve train. The heads are smog era junk, but lots of good aluminum heads on the market to cure that. Hard to say what's been done to the crank without some pics of it. For parts, most any parts store or online sources like Jegs or Summit... As to whether the engine is "good", depends on what the application is and the parts you get for it!!!