High Voltage

Hey guys,

I'm having a problem (we'll I've had a few problems) while fixing some wiring that burned up on my 73 Duster w/ 318.

Initially, I did the MAD electrical ammeter bypass, replaced all the wiring on my alternator, bought a new voltage regulator and a new 78 Amp alternator. Once I got the car fired up, the voltage was fluctuating a lot. I put the old regulator back in and voltage stayed steady at 13v, but I would blow a 40A fuse I had installed in place of the fusible link on the alternator battery cable when I would rev the engine above idle. I looked around for shorts, but found none, so I took the alternator in to get tested and it tested bad. So I installed a new alternator (again) and a new voltage regulator (again) and now the voltage at the battery won't come down from 15.6v. I thought maybe it was just because it was a little cold out and the regulator is temperature compensated so I let it warm up, but voltage didn't drop. I thought maybe it wasn't grounded enough, so I added a ground directly back to the battery, still no drop in voltage.

Any thoughts on what I else would make voltage stay so high? Should I just try a different part stores voltage regulator? Any ideas are much appreciated!!!