Did you re-use the front driveshaft? Did you move the axle forward an inch, it is my experience that a dana 60 pinion is 1 to 1.5" longer than a dana 44, this means the driveshaft needs shortening. Thoughts?

If possible drill where the straps go out, to where you can put u-bolts. This is stronger. If you do not do this, the bronco will light on fire and everyone inside of it will die of the hiv.