THANKS for that advice guys, I have a friend down here who worked on these engines when he was trained as a motor engineer by GM Australia in the 1950's, so I'm going to run all of this stuff by him and get him involvd.
I'm impressed by the quality of the knowledge being passd down, you can view this engine at
http://groups.msn.com/ZaccasStovebolts And nice to hear from my buddy SW_Radial again!