I've just re-checked the entry lists/results for the Spa 1,000km in 1967 - both in Wimpffen's and Delsaux's books.
(see below for extracts plus another view of the car in practice for the event)
The confusion I believe is that the 1963 Dock Special was used as the basis for this car but it was never called Apal Dock Special whilst it was competing at Spa. It was always referred to as an Apal-Ford.