Hi Chris I was wondering the same thing how you would go registering a 454 in qld.
The reason I ask is a couple of years back I looked at a hatch fitted with 454 big block in qld. Hatch was unregistered but had MOD PLATE which when I looked at the paperwork that went with the plate it said HOLDEN V8 CONVERSION. The seller assured me this was all it needed but I wasn't convinced.I took photos of the paperwork and went away to do my own homework to see if it was possible to get registered.When talking to people who do MOD PLATE inspections they told me that you can't put 454 into a torana in qld.They said you use to be able but changed the rules and I can't remember when they said the rules changed.I then contacted the transport department in the modification section and the bloke was very helpfull.He took the information I gave him as he wasn't sure but said he would find out and get back to me.He rang back a couple of hours later and said ther was no way I could ever get that car registered in qld.He did say the biggest engine you could fit was a LS because of the weight with the alloy so hopefully that is how you get through because the one I looked at was steel.
Hopefully I am wrong for your sake because that engine would be awesome.The one I drove was a tyre shredder and that engine you have there would leave it for dead.
Dale