The top speed of a 1976 Corvette depends heavily on the specific model and its condition. There wasn't a single 1976 Corvette; several engine options existed. A base model with the smaller engine would have a significantly lower top speed than one with the larger, more powerful engine. Also, factors like tire condition, gearing, and overall vehicle maintenance heavily influence top speed.
While precise figures are hard to give without knowing the exact specifications, you can expect a range generally between 110-135 mph for a well-maintained 1976 Corvette. However, it's crucial to remember that reaching and sustaining such speeds is unsafe and illegal on public roads.