I have been unable to locate the factory build specs, really the measurements only for the wishbone. Does anyone have these measurements from the Ford drawings. What is the measurement between the holes. Is the radius ball measured from each hole along the rods or perpendicular from the center of the holes.
The center to center between the holes should be about the same as center to center on the perch threaded ends. If the axle isn't bent, the wishbone straight, it's ball round and the perches installed the correct way every thing should line up. There are 2 basic types of wishbones, over the axle or under the axle. All the 1919 to 1927 were the same dimensions. What are you trying to do or find out besides your measurements question. Why?
There are two basic types - above and below the axle, but there are also variations in the lengths of the later ones. I don't have the Ford drawings, but I can point you to some measurements. See here:
Especially see my post at 12:45 October 14th.