next question is can you fit a socket on the bottom nut on the front side, or is the pinion in the way? Maybe you have a 65-66 Mustang 8"? (I pretty much doubt that, though)

Could be an early mustang center section, and truck style tubes and axles, and brakes....lol.

Unfortunately, all of mine are buried in the snow out back.

 

Nope I tried that one. Socket won't fit, so it's a 9". Thank God for that.

 

Ford 9 inch junkyard Questions.. - Pro-Touring.com Here's a pic on this link that shows a 1969 Cougar 351 9" which is what your tag indicates. Notice the tapered ends. If your's is a big bearing, it wouldn't have tapered ends. Should be 3" all the way. Ford 9 inch junkyard Questions.. - Pro-Touring.com

 

Okay, Havi, I've posted a set of pictures on Flickr here with shots of the back and front of the pumpkin, axle ends, flanges, etc.: Ford F100 - a set on Flickr
You can see the pumpkin has two dimples with the fill hole and the axle ends have the two holes with countersink in the middle


And here are all the measurements:
Axle flange-to-flange width: 57"
Axle tube Outer Diameter: 3.125" all the way (no taper)
Bearing size was about 3.15" OD
Flange hole spacing: 3.15" horizontal, 2.375" vertical
Bolt pattern is 5 x 5.5"
28 spline - the axle is tapered

Doing some google searching, the 57" axle width suggest that this is the 57-72 pickup?
High Q Ties - 9" Ford Information and Identification
FORD 9

So with all this, why does my axle offset measure 2.00" when you would expect 2.36"?

And thanks again for all the help.

 

Just Wondering if you have solved this problem? because im having the exact same problem but my offset is 2 1/16th on my 55 F100 it has all the same measurements as yours as well accept the offset

 

Haha. This thread is more than 5 years old. Best I can figure, the axle flanges were welded retrofits that weren't original, so a completely custom assembly. Feels like that is not uncommon practice. Good luck!