i haven't done any testing for this particular situation BUT. depending on the regulator setting on the single wire alternators they may not charge as much as they should. the reason being that the regulator can only sense what's at the output of the alternator so it can't compensate for line losses and loads. most "proper" charging systems have a remote regulator sense wire that is connected at some distance from the alternator such as a buss point so it can maintain the voltage required at that point. the voltage read at the alternator is going to be the highest reading but in reality you want the regulator controlling the field in response to the lower voltage found further out in the system.
i have used and still have a single wire on the sig car but imho it isn't really the best way to do it.
there was a website with a better explanation than these but i can't find it, however look at these (especially the second one) and you should get a better idea of what i'm trying to convey
doesn't matter what brand alternator the theory is the same. personally i think the denso units are probably the best choice
http://www.madelectrical.com/electricaltech/remotevoltagesensing.shtmlhttp://bob_skelly.home.comcast.net/~bob_skelly/alternator_conversion/wiring_alternator1.html
