The 4180C carb was a joint project between Ford and Holley Carbs. From what I read it was a regular Holey 4180 carb with some special tweeks and modifications for Ford. It was used in the Mustang and some of the trucks. My model was done from pictures only. I couldn't find any nice drawings with measurements. I hope it is close to scale but if you use the "SCALE" feature you can adjust to any size you want. If somebody has good measurements for it and wants to leave a comment then I'll be glad to adjust for any other users. I am also working on a Ford 302 engine and will be adjusting my intake manifold to use this on.