I have a Ford 428 Engine that was built and balanced about 40 years ago, it was in a 1973 Ford pickup for about three years and driven about 9000 miles and developed a slight knock, the engine was removed, and found it had a bad bushing on a wrist pin, it was put in an Engine box. The engine has 68-427 casting # on the back of the block. For more information, call Cliff @ 307-677-0749. Please no texting