Try this thread: http://www.c3vr.com/forum/forum_posts.asp?TID=67343&KW=hood+release ( logging in as guest will allow you to view without giving out any info)
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Mid-America Motorworks sells a tool for this.
Will a 1976 Corvette C3 Hood fit on a 1978 Corvette C3.
buy the special tool from ecklers that works thru the front of the door opening
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The hood for a 1976 Corvette is not the same dimensions as a 1980 despite their similarities. Modifications can be made to the hood to make it work but it will not look factory.
There are hood tools. But if it is stuck, you might have to jack her up, remove the wheel, and back fender skirt. Then the fun begins. If it is broken at the hood connection, you will have to bend a metal rod to reach, and pull.
HOW DO I OPEN HOOD ON CAR WHEN CABLE IS BROKEN
There's a special tool that'll release the latch by sticking it in between the hood edge and windshield. Any Corvette shop or even a dealer should have this. I've seen it advertised in Vette parts catalogs.
how to open hood with a broken cable on a 1994 ford explorer
dodge truck broken hood latch
If the cable isn't broken then you shouldn't have any issues opening the hood...