Here's a long answer which doesn't directly answer your question. Hopefully the following information can help you id the fans you have. Ford made so many variations of fans for different applications and they all seem to look alike.
The 1935 pickup uses a 4 blade 15 11/16" diameter fan (Part No. 50-8600) and the 1936 pickup uses a 4 blade 17" diameter fan (Part No. 67-8600).
You can see all of the different '35-'36 truck fans with blades, diameters and hub lengths in my book to make sure you don't have one of those.
BB trucks ('32-'34) use a 6 blade 15-1/2" diameter fan (Part No. 40-8600-B).
The '35-'36 cars use a 4 blade (??) diameter fan (Part No. 40-8600-A).