Can anyone help me with some background on this subject?
In 1967, Frank Stark approach BRM via his old friend Raymond Mays with a proposal to build a bifurcated port cylinder head for BRM's H16 F1 engine. This was considered alongside a 4-valve head project being conducted by Amherst Villiers and an in-house 4-valve project led by Tony Rudd. It was not Stark's first involvement with BRM, as his company had been involved in a project in 1964 in which Stark clearly felt BRM had not treated him properly.
This Leander cylinder head was built by C. J. 'Jack' Williams, formerly head of the competition and development department of Associated Motor Cycles, who had later worked for Bristol Siddeley until his division was closed down after the Roll-Royce takeover. He was apparently in demand from Lotus, Brabham and John Surtees - at least according to Stark.
Leander had done some work on a 4-cylinder Lotus-Ford 1600cc engine, which was apparently very promising, but the head they did for one of BRM's F2 P80 engines in November 1967 gave 10% less power than a standard P80. Leander took it away to work on it, but I have not yet located the box in Rubery Owen's archives that will tell me what happened next.
I have been trying to google more about this company and its principals, but keep hitting references to that much better-known American engineer Tony Stark, who I am confident is unrelated.
Can anyone help?