I bought a 70 nova in high school with a straight 6. I built a 454 gmc truck engine with the tall deck. When time came to yank out the straight 6 I took bets on how long it would run with a brick on the gas pedal after draining the coolant and oil. The longest bet was maybe three minutes. It ran almost 20. It was winter time. It locked up. During the time it ran it through a rod and still ran. After the show it was going in the garage. We hit the key for giggles and it started up again.
Good story.