a 7 rib bigport 4age (Oz delivered AW11 4age with the 'red and black' writing on the inlet cam cover) shares the same crank and rods, same as later model smallport 4age/gze's.
a 7 rib bigport 4age (Oz delivered AW11 4age with the 'red and black' writing on the inlet cam cover) shares the same crank and rods, same as later model smallport 4age/gze's.