[Russ Noble]

Ah, found it.

I copied the actual page at the time from "Ford GT40 Superprofile"
John Allen. Part of the narration that goes with photo 23 on p38 states:-

"It was easily the most successful private entry GT40, helped by its Hewland gearbox which allowed quick changes of ratios ensuring that the car was correctly geared for each circuit visited"

I was sure I had a good authority for that. I would imagine John Allen would be right, but who's to say....