It uses a standard GM mounting. It fit in place of my original 1984 alternator with no mods. I believe it's a one wire also. I had to get an adapter wiring harness, since the 84 wiring is not one wire. They sell that too, if your setup needs it.
I also have a PM 16 volt 200 amp alternator and battery and it has been running with no problems. I actually bought two 16 volt setups and my friend that has the second one is selling his car and never installed it. I think we paid $200 for the 33 lb. battery and $435 for the 200 amp alternator (black powder coated case). He might want to sell the setup.
Jeff