This is not a car set up for FIA races but it was the only one I saw on The Henry Ford site that posts the original factory images with an oil cooler scoop on a race Cobra. There are several 427 Cobra scoop images in the collection. The spherical bearing on the front stabilizer bar end link and the stainless steel oil cooler hose covers makes me think this is an early image of CSX2431.
Cobra Make, Engine: Viking Blue "64" 289 FIA comp car by Superformance #0002, Keith Craft - 331 (460HP), Jim Inglese - 48IDA Weber carbs, BW T10 4spd.
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I agree with Jeff and consider vintage photos of 2323 & 2345 at the start of (or at least during) Targa Florio 64' to be the best reference. Mainly because they were the last two "FIA" cars purpose built by AC (including "dimples" btw-) and hadn't been previously raced.