I'm with Evan on this one.
The argument that there is no such thing as a 'dimensionally accurate' Cobra is simply unfounded. Look at period photgraphs taken at AC and Shelby American during the actual manufacturing of the cars and you will see that they are pretty much all alike. While hand made, they still followed the same set of patterns and body bucks. Years of driving/racing and bending fenders, front/rear ends, etc., as well as owner alterations took their toll, and while today there appear to be several shapes and interpretations, they just did not start out that way.
Actually though, Evan, from an exactness standpoint, I think the Kirkham is more accurate than the Shelby 4000 Series. I say this because I believe Shelby elected to upgrade their front A-arms with adjustability that the 3000 series cars (and Kirkhams replica) omitted. My car is an earlier unit, and like your's features the Girling style calipers and solid rotors. but retains the original one-piece A-arms. The Kirkhams also still employ the original fuel tank set up, while Shelby uses the 18 gallon cell. Splitting hairs, I know, but what the h--l......
Bud