Been fighting a starting problem for months with a 1976 Corvette. Car starts fine on first try, but if I shut off the engine, it won’t crank again for hours, usually overnight. All I get is a buzzer noise when I turn the key - no starting motor noises. This happens no matter how long the engine has run, be it 30 seconds or an hour, so I don’t thing the starting motor is getting hot. Car has a new battery and alternator - that didn’t solve anything. Does anyone have an idea what to check or replace next? Starting motor? Solinoid? Ignition switch? By the way, the car has a manual transmission. Please help before I roll this car off a cliff!