We tried snugging those pleated cotton-gauze breathers. We tightened the valve cover bolts. We tried new valve cover breather grommets. We swapped on different breathers.We even tied old rags around ...

We didn't get 10 miles down the highway with our new 496-inch big-block before the smile faded and turned to a frown. The rearview mirror told the story: We were trailing a noxious cloud of oil smoke ...