joshua,
still trying to find out more info on who built the engine. the engine was rebuilt in California i assume before it was sent to Australia.
i found out it's running at about 11.5 to 1 compression. runs a ISKY race cam and ARIAS forged race pistons. going by their web sites they sound like pretty respectable componants over there!
if any one can help me find out who would have built it, would be much apprieciated (big ask i know!).