1969 RR took it out the other day and as it was warming up the amp meter spiked and wouldnt come down. I figured a voltage regulator because it has happened before. Replaced it with a really good quality standard part. Made in USA. Replaced it and same thing is happening. Un hooked the battery and the car actually revs up to 4 grand and the gauges start to spike. So I hooked up the battery and parked the car again. Once it was off I unhooked the battery. Is it a junk alternator? Or am I going to be chacing grounds for a short?