James King, in the Brabham-Climax BT7 used by Dan Gurney to win the 1964 French and Mexican grands prix, was coming through fast as wholesale changes took place throughout the field. King moved into the lead on the fourth lap with Nick Fennel in another Lotus 25 tacking on behind Middlehurst. Joe Collasacco in Ferrari 1512 was also in the mix but, on the 10th lap, the American hit the chicane hard, bringing out the safety car.
Middlehurst jumped ahead of King on the restart. The Brabham driver continued to press hard, the pair racing side by side before Middlehurst just managed to take his fourth successive Glover.