Just like eating an elephant, one mouthful at a time. I notice you have the Mallory version of the regulator. I have no idea what the voltage setpoint is on that version. Others I have seen vary from 13.5 to 14.5 so maybe 14.9 isn't unreasonable. I'd try another regulator if you have concerns. The fact that the system voltage is at 14.9 is a good sign that the regulator is regulating. As a note be sure the regulator case is grounded well, a poor ground connection will tend to produce a higher regulated voltage.