Dana 60 swap

With a plasma cutter and mig welder you can make anything fit anywhere. Yes, the F250 Dana can fit under you car, though,as mentioned, it will need to be narrowed and new ends will be needed for the housing and you'll need new axles and backing plates and also new spring perches in the correct locations. Best thing to do is get in touch with Cass at Dr Diff. He's a forum vendor and offers a forum discount as well as being a super cool helpful guy. He can answer all your questions. Here is his web site:

DoctorDiff Drivetrain Components
Cass does not offer a discount to Members. I reached out to him earlier this year (via email) and his response was that because his prices were already low he could not offer a discount. Also although he may be a member here he is not one of the forum vendor sponsors.