I doubt that there would be no areas of Common Property within the site that you’re looking at, but in any case there are are significant differences between the Planning Laws applicable to the development of Strata Titled land and those that apply under Torrens Title, so I’d say that there’s almost no possibility that the former could easily be converted to the latter post development.
Have a talk with the local Council, and while you’re there, also discuss the possibilities of an extension to the Strata property in circumstances where you could, if your proposal is “approvable” by them, provide Council with a minuted Special Resolution of a General Meeting of your Owners Corporation outlining its prior consent – because that’s what you would need, even though there are only 2 Lots.