Here is a table of SD 455 Engine Unit Numbers (or Motor Unit Numbers)
These give a historical look at the SD engine and how they were installed in the SD Firebirds.
Here is a link to an input form that can be used to enter any EUN's
If you have any additional engine numbers please input them at the above link.
The following tables are broken down into 1973 SD engines/VIN and 1974.1973 SD EUN:
| Year | Engine Code | Cast Date | Block Code | VIN | EUN | Car Model | Plant | Build Date | Comments |
|---|---|---|---|---|---|---|---|---|---|
| 1973 | XD | A??3 | 490132 | - | 406389 | Trans Am | N-Norwood | - | Leading partial zero SD 455 |
| 1973 | ZJ | - | 490132 | N144657 | 515302 | Trans Am | N-Norwalk | 07C | SD 455; this eun seems off compared to the VIN? |
| 1973 | XD | K112 | 490132 | N139850 | 727236 | Trans Am | Norwood | 06C | SD 455 |
| 1973 | ZJ | - | 490132 | N137610 | 730614 | Trans Am | N-Norwood | 6-73 | SD 455 |
| 1973 | XD | - | 490132 | N137131 | 734296 | Trans Am | N-Norwood | 06A | SD 455 |
| 1973 | XD | K112 | 490132 | N137914 | 751974 | Trans Am | N-Norwood | 06B | SD 455 |
| 1973 | ZJ | K112 | 490132 | N138299/N138018 | 769884 | Trans Am | Norwood | - | SD 455 |
| 1973 | XD | - | 490132 | - | 777237 | Trans Am | N-Norwood | - | SD 455 |
| 1973 | XD | - | 490132 | N139423 | 781238 | Firebird | N-Norwood | 06C | SD 455 |
| 1973 | XD | K182 | 490132 | - | 805729 | Trans Am | N-Norwood | 7-73 | SD 455 |
| 1973 | XD | - | 490132 | N140124 | 822912 | Firebird | N-Norwood | - | SD 455 |
| 1973 | XD | - | 490132 | N140166 | 829960 | Trans Am | N-Norwood | 06C | SD 455 |
| 1973 | XD | - | 490132 | - | 851095 | Formula | N-Norwood | 7-73 | SD 455 |
| 1973 | XD | K112 | 490132 | N144548 | 865802 | Formula | N-Norwood | 07C | SD 455 |
| 1973 | XD | K112? | 490132 | N142958 | 868476 | Formula | N-Norwood | 7-19-73 - shipped date | SD 455 |
| 1973 | XD | K112 | 490132 | N143478 | 875440 | Trans Am | N-Norwood | 07C | SD 455 |
| 1973 | XD | K112 | 490132 | - | 88?862 | SD Formula | N-Norwood | 07C | SD 455 |
| 1973 | ZJ | - | 490132 | N144933 engine has N144932? | 882095 | Trans Am | N-Norwood | 07E | SD 455 |
| 1973 | XD | - | 490132 | - | 882240 | Trans Am | N-Norwood | 8-73 | SD 455 |
| 1973 | XD | - | 490132 | N144632 | 892618 | Trans Am | N-Norwood | 07C | SD 455 |
| 1973 | XD | - | 490132 | N145023 | 896377 | Trans Am | N-Norwood | 07D | SD 455 |
| 1973 | XD | K112 | 490132 | N145255 | - | Trans Am | N-Norwood | - | SD 455 |
| 1973 | XD | K112 | 490132 | N144666 | 896387 | Firebird | N-Norwood | - | SD 455 |
1974 SD EUN:
| Year | Engine Code | Cast Date | Block Code | VIN | EUN | Car Model | Plant | Build Date | Comments |
|---|---|---|---|---|---|---|---|---|---|
| 1974 | Y8 | K112 | 490132 | N115xxx | 130569 | Formula | Norwood | 11C | SD 455 |
| 1974 | Y8 | K112 | 490132 | N115xxx | 160458 | Formula | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | - | 205296 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | K182 | 490132 | N116086 | 229462 | Trans Am | N-Norwood | 11-27-73 | shipped date SD 455 |
| 1974 | Y8 | - | 490132 | N116092 | 229532 | Trans Am | N-Norwood | 11D | SD 455 |
| 1974 | Y8 | - | 490132 | N115366 | 236436 | Firebird | N-Norwood | 11-21-73 | shipped date SD 455 |
| 1974 | Y8 | K112 | 490132 | N115736 | - | Trans Am | N-Norwood | 11D | SD 455 |
| 1974 | Y8 | A093 | 490132 | N116xxx | 274016 | Trans Am | Norwood | - | SD 455 |
| 1974 | Y8 | A093 | 490132 | N122xxx | 297126 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | A093 | 490132 | N120809 | 304434 | Trans Am | N-Norwalk | SD 455 | |
| 1974 | Y8 | - | 490132 | N119929 | 311496 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | A093 | 490132 | N121813 | 314946 | Trans Am | N-Norwood | 01A | SD 455* |
| 1974 | Y8 | - | 490132 | N121xxx | 318419 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | A093 | 490132 | N122xxx | 321614 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N121633 | 321839 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N120506 | 321901 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N121xxx | 328901 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | A093 | 490132 | N123283 | 339224 | Trans Am | N-Norwood | 01B | SD 455 - N123282 on engine block |
| 1974 | Y8 | - | 490132 | - | 339366 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | - | 356460 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N131678 | 368897 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | A093 | 490132 | N131895 | 373423 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N132334 | 373470 | Trans Am | N-Norwood | 02B | SD 455 |
| 1974 | Y8 | L203 | 490132 | N162482? | 373485 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N151xxx | 373487 | Trans Am | N-Norwood | 5-74 | SD 455 |
| 1974 | Y8 | - | 490132 | N133137 | 373501 | Firebird | N-Norwood | - | SD 455; G073 on heads |
| 1974 | Y8 | A093 | 490132 | - | 373648 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | K112 | 490132 | - | 380886 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | W8 | - | 490132 | N139887 | 398314 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | W8 | A094 | 490132 | Nxxx141 | 398378 | Firebird | N-Norwood | - | SD 455 |
| 1974 | W8 | - | 490132 | N151836 | 409879 | Firebird | N-Norwood | - | SD 455 |
| 1974 | W8 | - | 490132 | N149239 | 424353 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | W8 | - | 490132 | N149693 | 436360 | Firebird | N-Norwood | 04C/D? | SD 455 |
| 1974 | Y8 | - | 490132 | N152913 | 449668 | Trans Am | N-Norwood | 05B | SD 455 |
| 1974 | W8 | - | 490132 | N155051 | 465414 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | W8 | - | 490132 | N157186 | 465420 | Trans Am | N-Norwood | 05D | SD 455 |
| 1974 | Y8 | - | 490132 | N157449 | 467630 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | L203 | 490132 | N157061 | 474208 | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | - | 487807 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | L203 | 490132 | N159999 | 487827 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | W8 | A094 | 490132 | N160523 | 490493 | Firebird | N-Norwood | SD 455 | |
| 1974 | Y8 | - | 490132 | N160755 | 497104 | Formula | N-Norwood | 6-74 | SD 455 |
| 1974 | Y8 | L203 | 490132 | N160705 | 497107 | Trans Am | Norwood | 06B | SD 455 |
| 1974 | Y8 | L203 | 490132 | N160799 | 497108 | Trans Am | Norwood | 06B | SD 455 |
| 1974 | Y8 | L203 | 490132 | N160410 | 497125 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | F233 on head date | 490132 | N160455 | 499393 | Trans Am | N-Norwood | SD 455 | |
| 1974 | Y8 | C294 | 490132 | N163xxx | 501618 | Firebird | N-Norwood | Unknown | SD 455 |
| 1974 | Y8 | C294 | 490132 | N163148 | - | Firebird | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N168xxx | 519997 | Trans Am | N-Norwood | 6-74 | SD 455 |
| 1974 | Y8 | - | 490132 | N168533 | 520198 | Trans Am | N-Norwood | 07D | SD 455 no leading zero |
| 1974 | W8 | - | 490132 | N172391 | 522295 | Formula | N-Norwood | 8C 8-23-74 | SD 455 Last SD car built |
| 1974 | Y8 | L203 | 490132 | N167355 | 522383 | Trans Am | N-Norwood | - | SD 455 |
| 1974 | Y8 | - | 490132 | N168278 | 527143 | Trans Am | N-Norwood | - | SD 455 |