I have a spare spindle buried in my parts box it is for a 96 Ford Dana 60.
(looks like this)
If you need it for a Ford I can dig it out and measure. I don't have a accurate way to measure a round thing that big so it wouldn't be super accurate.
Thanks. I was just toying with the idea of making my own free spin kit for a 2005 Ford Dana 60 front axle. Don't think it's gonna work with that spindle diameter and the size of the hole in the unit bearing knuckle.