Factory build sheet discrepancy

Good evening,

I recently acquired what appears to be a numbers matching ‘66 barracuda. VIN matches the broadcast sheet. Everything lines up... except the engine. Sheet and VIN shows a 225, in the vehicles is a ‘66 273-2bbl. Block is a stamped ‘66, and EVERYTHING appears to be stock - stock A/C, stock points, etc. Only thing that stands out is the 273.

Are there any articles about build sheet discrepancies? It feels as though this was a factory mistake. Would love some articles or resources to take a look. Thanks all.

-Joe