Query on port-heads

[AustinWood]

I believe that Colin Chapman's modification was done by the inlet manifold which had a plate protruding into the siamesed inlet ports to divide them. Then inlet manifold was double and fed in pairs 1&4 and 2&3. It used a Ford V8 Stromberg carburetor which is a double unit. Effectively 2 units fed from one float chamber. Two barrels each with their own jets running in parallel. This gives better gas flow and allows each pair to be tuned separately.
I don't know where I got this from, possibly made it up?