[Healeys] Voltage regulator settings

[Ron Fine]

I am trying to find the correct values to adjust my voltage regulator (61BN7).
I have two sources that do not agree.

 Haynes "Owners Workshop Manual" l has at 30 deg. C  15.9 to 16.5 volts.

Bentley "The Complete Official Austin-Healey"  has at 30 deg. C.  14.5 to 15.1
volts.

Can anyone help me here?  I just don't want to fry my new battery.  My wire
harness is also new.

Thanks,

Ron Fine