I now see that it might be wrong info on the site......
http://www.uprproducts.com/mustang-s...ions-1990.html
1990 FORD MUSTANG VIN DECODER
Engine Code / Engine/Body/Options
* 1FA ... Ford Motor Co.
* C ... Restraint System (C-air bags & active belts)
* P ... Passenger Car
* A ... 2.4L EFI Inline 4 90hp
* E ... 5.0L EFI V-8 225hp
* 40 ... 2dr Coupe
* 41 ... 2dr Hatchback LX
* 42 ... 2dr Hatchback GT
* 44 ... 2dr Convertible LX
* 45 ... 2dr Convertible GT
* 6 ... Check Digit (varies)
* L ... Year (L - 1990)
* F ... Plant (F - Dearborn)
* 000001 ... Consecutive Unit Number
Example: 1FALP4046RF000001
Location: Stamped on the plate which is riveted to the driver's side of the dash, visible through windshield; the certification label is attached to the rear face of the driver's door