There may be some differences between f1 and the later f100 brakes, the f100 brakes are a common swap.Check this article out,
Courtesy of Deuce..
And a little more info by Pasadenahotrods regarding which spindle you may have and bolt patterns and such...
Early Ford Spindles fitting early Ford axles
I found those using the search function here on the site.
Hope this helps, mikey