my oil pump locked up in my 89 302 efi. It twisted the shaft. I took apart the pump and saw a piece of metal in it. There were three more pieces identical to it in the oil pan. I checked all the main bearings and rod bearings visually, dizzy gear, pulled the upper intake, took off valve covers, 1.6 rockers look good, nothing looked out of place, or worn. I do have a v2 sq supercharger on it. The metal pieces are all same consistency , like a watch battery, flat like a pancake on both sides, yet round like a pancake. The oil pump and shaft were stock.