My ampmeter is pegging

I don't know what that has to do with the charging circuit.
My 69 pegged the meter and blew out my pertronics ignition, the stereo and the fuseable link. Take it to Advance Auto and they will check the charging circuit. Number match the regulator to the alternator to make sure they are compatable to work together and operating correctly. I replaced by fuseable link with a 50 amp slo-blow fuse and always carry an extra one in the glove box. I have never needed to replace the fuse but it's a good insurance policy so you don't get stranded on the road.
Don't quit till you find the problem, these cars are prone to electrical fires. In the tech pages on this site or BBD are the plans to convert from an amp meter to a voltage meter which is much safer.

Good luck, Jim