1980 mgb Alternator

["Christopher W. Reichle" <Christopher.W.Reichle@students.Miami.EDU>]

Above 2500, my lights and all other electrical devices flicker slightly. 
At night I can see a very faint flickering of the charge light on the 
dash with each dip of the headlight's power. 

I think that this might be the voltage regulator. It is an original Lucas 
unit on a 1980 MGB. Is there any way to change the regulator on this 
unit? Am I barking up the wrong tree? Any advice would be great.

Thanks,
Chris