Trimatic isn't original to the 308, block must be from a manual HJ, so more than likely from a GTS sedan or coupe or a Sandman ute or van. All other standard 308 applications in HJ at the time were TH auto (LS, Premier, Deville and Caprice). It could of course be an ordered option from a Belmont or Kingswood Sedan/Wagon/Ute or a HJ Ute/Van but far more likely to be GTS or Sandman.