<VV> Alternator question

[AeroNed at aol.com]

Since I installed the all important voltmeter in my Corsa coupe, I've  
discovered that the alternator is putting out 15 volts all the time. When the  car 
is off, the battery shows 13.5 volts. The alternator is internal  regulated 
that is puts out something like 50 amps. It's the rear of a unit from  a mid 80 
GM car with a Corvair front and fan. I'm not blowing lights or anything  but it 
sure seems like I need a voltage regulator. What does the group of  experts 
think?  

Ned  Madsen
MCCA President - Wichita, KS
1966 Corsa 140/4 speed
1965 500  Sedan 95/PG
www.KansasCorvairs.org