Ford D5ta-2c013-aa -

You are holding a 50-year-old piece of Ford’s transition period—rugged, heavy, and obsolete, but absolutely vital to making a 390 cubic inch V8 breathe quietly again.

This is a niche but technical request. The code is an Engineering ID number (often called a "casting number" or "stamped number") used by Ford Motor Company, not a standard service part number. ford d5ta-2c013-aa