Interesting tidbit on your 1st link to the 70-75 hoods shows what looks like a 1976 Firebird with the 70-75 Formula hood. Which also shows how the hoods will interchange between 1970-1976 no problem.
As said the 77 and up fenders/nose/etc would need changed to use a 70-76 hood.
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John Wallace - johnta1
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