Electrical Help

Hi, I put a new 6AL digital box on my Cuda. Now voltage is climbing above
15 volts when the engine is started, and there is amperage fluctuations on the amp guage.

I replaced the voltage regulator, but it is still occuring. I could put the old 6AL box back in, but MSD says the problem is something else in my system.

Do you think my alternator is screwy?

Thanks
Author: cudabob496