1961 Corvette battery gauge reads negative

1961 corvette battery gauge reads slightly negative when driving. Just installed a new battery. A problem?

Yup, a problem. Check the generator (or alternator) output. Check voltage at the battery when the car is running. It needs to be more than about 13.5 volts. A generator may need you to rev up the engine to 2000 rpm or so to get that reading.