Probably, if your song is contained in a single audio region, you could simply stretch that region after setting the project tempo to 76.
Alternately, create a new empty project that you set the tempo to 76; and then upon importing the audio file, you deny adjusting the project's tempo to the imported audio's one, when Logic pops up the alert for same.
Or you could try SMPTE-lock the audio region, then change the project tempo (to 76), then BIP the locked region to the new tempo.
There could be other methods...
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