So if I'm using the ford diffs or the JY dana 60 will the bolt pattern be the same as my 5 on 4.5
or do I put my axle shafts in the dana or ford diffs?
The Ford diffs should be the regular Mopar 5 x 4.5" bolt pattern unless you have a truck unit which
might be 5 x 5".
You'll have to use axles made for those particular diffs but a lot of guys have Ford ends put on their
axle tubes (no matter what diff they use) because there are economical Ford Explorer disc brake kits
that can be retrofitted later.