How much voltage?

The VR went out on my '65 Dart GT, 273 2bbl. I decided to upgrade to a 70s VR. After the install and re-wire the alternator is putting out some amps and volts. At 700 rpm volts are 17.4, at 1000rpm volts are 18.5, and at 2000 rpm volts are 19.0 all measured at the battery. I'm thinking these numbers are a bit high. Anyone have any idea if theses are out of acceptable range? My concern is frying the cars's electrical system.
Thnx!