WANTED ! HEMI 6 (Austrialian market)

Anybody have any information about a HEMI 6 6cylinder engine ? It was available in the Austrialian markets from 1970-1981. I'd like to know whatever you can tell me about the engine and does ANYbody know where one of these engines could be acquired at a reasonable price ? I want to install in my '63 Dart GT convertible and think this would be a good choice for a machine with a little different twist ? Tell me what you think... Tnks,BILL (homslr)