Automobile Magazine was invited into General Motors Performance Build Center to watch and lightly assist in the buildup of a ZR-1's internal combustion heart. It takes four-and-a-half hours of real time to go from a bare block to a fire-breathing, supercharged LS9, but through the magic of sped-up video, it only takes seven minutes of your life. You won't come away with anything productive for that time, unlike the people in the video, who get the pleasure of creating a small-block V8, but it's a neat picture of how it all comes together. We just hope that some other poor sucker gets the motor that the magazine intern fiddled with. Video posted after the jump.