Just caught the last 20 minutes of this film - great stuff as always.   Two ambulances were used - a 4 x 2 and a 4 x 4. The front driven axle and propshaft from the transfer box (which featured heavily) seem to appear and disappear almost constantly during the journey!   Was there ever such a beast as the 4 x 4 K2, or was it just a special for the film?