Reading Alan Henry's book about GP Brabhams I was reminded that Jacky Ickx (1969) and Rolf Stommelen (1970) came to the team with "a couple of DFVs". That fits with Ford branding on the cars. Tyrrell Racing Organisation and JYS were closely connected with Ford, so we can assume that engines were free or subsidised. And at Lotus where it all started, we can assume that Colin Chapman organised a good financial deal.
Who else had a free or cheap DFV deal in those days? Or a Ford decal on the car?
How does the £100,000 seed money from Ford to Cosworth compare with the cost of DFV engine deals sponsored by Ford national subsidiaries?