Quote from 1967hipo289
I don't see much discussion on the engine tag that is bolted to the intake manifold.
Engine tag decoding has been discussed here over the years. A lot of this detailed information now resides in the Archives in order to save "webspace" on the current pages. All inactive threads are sent to the Archives after three years. As a result, the majority of pages contained in this site now reside in the Archives. You can access the site Archives by clicking on the Archives icon
found on the right hand column of the forum home page, or check the Archives box when using the Advanced Search feature.
The "554" on the second line denotes a 64/65 K Code 289 High Performance Mustang with a manual transmission.