I dug up this info some time ago.... don't remember where, but I've yet to find exceptions to it.
80-84 F350 was dana 50 ttb
85 F350 was dana 50 ttb OR dana 60 solid
86-98 F350 was dana 60 solid
80-96 F250 (light) was dana 44 ttb
80-98 F250 (heavy) was dana 50 ttb
80-96 F150 was dana 44 ttb