thanks Sime. I found some of the schematics you mentioned on-line and am headed in the right direction now i reckon. i'll have a chat to Holden.
for the sake of anyone reading this later researching, i think the matching plug for the LS1 alternator (which is GM part number 92058857) is a Yazaki, 6.3 Series, 7223-6224-40. Otherwise known as a mitsubishi "SP" alternator plug.
you can see the alternator side of this plug here:
[ame="http://www.amazon.com/ACDelco-92058857-Original-Equipment-Alternator/dp/B0010GHVRS"]Amazon.com: ACDelco 92058857 GM Original Equipment Alternator: Automotive@@AMEPARAM@@http://ecx.images-amazon.com/images/I/41K5DuRxL7L.@@AMEPARAM@@41K5DuRxL7L[/ame]
and buy the mating one here if you need to:
Alternator Plug / Connector to suit Bosch - Hitachi - Mitsubishi - Ford - Holden
All of the above should be read with the disclaimer that i am no expert :-)
thanks again
Mike