I'm not sure. The meter I was using a month ago was analog and topped out at 15v. With the new digital meter. There's a fairly constant 15.25 (+-.05v) no matter what the RPM is.
Yesterday was the first time I fired it after a month of pulling and repairing the underdash harness (Big black Alt wire was fried at the bulkhead) I really thought I had it. When I started I had 15.1 v constant with the new digital meter. I thought maybe the cold weather drained the battery a bit, so I charged it up and tried again...ironically the voltage went up to 15.25.