Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head. (Photograph by Chris ...

ZedSled, our project 1978 Chevrolet Camaro is receiving an LS conversion, specifically a 6.0 LQ4 truck engine, an iron-block version of the LS2. The six-bolt main block is stronger, but it's 70 pounds ...