I swear I've seen the measurement on here somewhere before, but I can't seem to find it anywhere. Even in the D60 bible, the columns are blank. How far is the differential offset on these axles? Distance from axle centerline would be ideal. All I can find is that the later Ford 60s are 3.5" MORE offset than the 78-79, however I can't find what these are.

I snapped these for you with my phone, if you need something different let me know and I will try to get what you need. I hope this helps.

this is from the outside of the passenger knuckle to the outside of the pumpkin casting:
http://img.photobucket.com/albums/v637/kaotic1100/leftsidedana60.jpg

This is from the outsdie of the pumpkin casting or spring perch to the outside of the driver knuckle:
http://img.photobucket.com/albums/v637/kaotic1100/rightsidedana60.jpg

Thanks a bunch! Exactly what I was looking for. I see it's your first post as well. Welcome. :smokin:

Minor point, but can you confirm as to whether the spring pad width is 2.5" or 3" (or ???). Ford is left blank in Dana 60 bible. Lets get some more things filled in on it.

For some reason it never occurred to me until now that I could use the axle shaft lengths to find the offset.

According to Bill Vista's D60 bible:

long side inner: 34.56" 78-79 F250 and F350
short side inner: 18.68" 78-79 F250 and F350

This puts the long side at 15.88" longer than the short side, making the differential 15.88" offset to the driver's side.

Someone please correct me if I'm wrong.

The spring perches are 3" wide.