Hello Jay
The consolidated list of rules/regulations is contained within the Australian Design Rules (ADRs)
The following link takes you to a .pdf that has a summary list of the ADRs
http://www.rta.nsw.gov.au/registrati...s_nov_2007.pdf
You can purchase the ADRs on CD (or can find them on
www.comlaw.gov.au)
Engines are an issue - many now choosing the LS series rather than contend with the 5.4 modular engine (4.6 is not certified) however, I understand some states have their own sub-set of rules that will allow a particular engine combo - hopefully someone will chime in here.
Good Luck
LoBelly