Where is the Serial number located on a 1973 351 V8 Ford Marine Engine?

The serial number on a 1973 Ford 351 V8 marine engine is typically stamped into the block on the starboard (right) side, near the top. It may be difficult to see as it may be covered in paint or debris, but it is usually located on a flat surface. The number is typically eight characters long and consists of letters and numbers.