This video is kind of long, but Derek goes into how to disassemble, diagnose, and evaluate an engine (in this case, a Ford 302). It was originally going to be a “how to overhaul an engine” video, but as he discovers fairly early on, this isn’t the low miles engine it was supposed to be, so it turns into a “how to evaluate an engine and figure out that it needs to go to a machine shop” video.