Like the iconic Small-Block Chevrolet and Air-Cooled VW, the Slant Six is one of those engines that must be included in this series. It wasn't made for quite as many years as the other two (though it made it well past 40 years if you count engines sold in Mexico), but it established a well-deserved rep as a virtually indestructible powerplant. We all have stories; I've seen one that was filled to the brim with water (by an owner who got a bit confused about the difference between radiator cap and oil filler cap) and then driven for a week that way, spewing brown foam out the tailpipe all the while, with no apparent damage. They respond quite well to hot-rod modifications, such as the nitrous-equipped unit in the photo above; you can even junkyard turbocharge it! [allpar]