Dodge first equipped the 318 small-block V-8 in the middle of the 1967 production year. However, the engine was essentially the same as the earlier 273 engine, but with a slightly larger bore. Although the 318 was never considered a high-performance engine, its durability made it a popular engine selection over the base model six-cylinder engines. As with all engines, the 318 does require a periodic tune-up. Fortunately, doing so is fairly straightforward — provided that the engine’s specifications are adhered to carefully.
The 318 was equipped with type N14Y spark plugs. The spark plug gap was .035 inches.