1) Test the alternator with a scope test to verify the wave pattern to see if there is any spikes in the system.
2) get a strong 85-90 amp alternator.
3)get the electronic regulator or do the mod to using the newer regulator.
4) test the ampmeter to check for a faulty unit
5)check the cluster regulator for its performance or do the mod found on the mad electric web site.
6)Check the bulkhead connector for loose or burnt connectors.
After doing these things and finding the problem,send me 2 cases of beer,(COLD) and thank me by email,Mrmopartech