Just installed a new cs 130 alt in my car, it bench tested 156 amps. My last alt couldnt keep up with the 50 amp fans and air conditioner. Any way, the new alt would not "turn on" so when the car was running the volt gague only read 12 volts.I checked the conections, and did a search on this site to confirm that it was wired correctly. I was about to return it for another check, when I realized that I had my Allen Grove bracket that holds it in place powder coated, including the spacers and bolts, so I ran a wire from the housing to the block, and shazam, 14 volts on the meter.I removed the wire and the lower mounting bolt and spacer, ground the coating off the bolt,the ends of the spacer, and the inside of the bracket where the spacer contacts it, and all is well in the Chevelle. I believe this is what solved the problem, the alt housing has to be grounded to the block. But I havent seen this mentioned on any post I have read, and that has been a bunch. If John or Pete could responed to this post, and let us all know if this is right, it may spare someone else a lot of trouble.