hehe watching canada's import trends are like going back in time in australia by about 10 years.
Anyways CONAN, you're gonna need an engineers cert in NSW showing that the car will meet braking and emissions standards for the SR20 as the national databases have data for R32's equipped with RB20DE, RB25DE, RB20DET and RB26DETT engines, but not the SR20DET. We went thru the same thing when we imported a RB20E R32 GTE under the 15 year rule and had a real fun time trying to get it registered.
That said I know some guys with SR20DET ceffy's and RB20DET 180sx's who aren't engineered, so I think it's up to the motor registry what they want you to do.
Other than that it will also probably need to be re-complianced to NSW safety standards (each state has different ones for 15 year old imports) which means you'll need to change the seatbelts etc as I don't think that's a requirement in Tassie. Talk to your local blue/green slip providers. You'll also need the original import certificate which you can get from DOTARS if you the seller doesn't have a copy of it.