Pair of Oldsmobile 303 cylinder heads for sale, they are freshly rebuilt and have not been run on an engine. They were rebuilt for my 303 and installed with gaskets, but the compression was still very low, and upon taking it apart, found it has bad piston rings. So I'm building a 371 engine instead and want to sell the 303 parts.. Message me and we can exchange phone numbers. I can drop them off anywhere between Nashville, TN and Minneapolis, MN as I travel between regularly. Engine is pictured, I have the entire engine and air filter if your interested, will make a deal.