I'm sydney based so don't know any in melb.

I can tell you now that you will need a charcoal canister, evap set up, boxed filter, and your tune will need to be done to comply with the emissions regulations.

Adjustable fuel regulator will need to be locked off so you can't adjust it also.

Lots of things to comply with. Now they did tell you that if you put a k20 into a dc2 u don't need to engineer it right?