This chrome rocker cover fits my 1979 Plymouth Slant-Six but there are a few issues. It only has two holes, but my original valve cover has three (one for the PCV valve, one for the vent, and one for the oil). To use this valve cover I have to replace my OEM air filter with a custom air filter, or I can either pull out the PCV valve to add oil or I can pull out the breather to add oil. Either way, it's uncomfortable. I did not return this product because I might later decide to forego the standard restoration and have a custom restoration. If all else fails, it looks pretty and glitters on the shelf.