Since we've seen MANY comments concerning soaking our engine in various oils and chemicals to free it up, I figured I'd post and pin this to clear some things up for everybody: We soaked the engine in multiple fluids for many weeks. That's part of the reason the tops of the pistons looked soooooo nasty. Chemicals had been eating away rust, oil, dirt, and mice nests for a long time. And we still had to hammer out the pistons. It's an old engine that had been sitting in a field in Northern Michigan for 40 years. Also, it's not Davin's first rodeo. He'd be the first to admit that he doesn't know everything, but he has been rebuilding engines for quite some time.