im in sydney... out near parramatta if that helps at all ive had a chat to a few mechanics and the concensus is that the mountings are the same, but i hadn't considered the fuel tank...
as for the gearbox, i have the 5 speed man box to suyit the 22r engine, as i have purchased the entire rt142 corona (smashed side on, but no engine damage... pretty much just the drivers door...