In the past I've done some swapping on my own and helped on a few the ford route is totally different than your's, you have two option's (1) measure both wheel base's of the truck, van if the same your in luck on the body swap with minor adjustment's asfar as steering, new body mount's (2) If your wheel base is that far out then find a donar chevy truck between the year's 1973-1987 I beleave and torch the frame at the middle of the cab area and if no cab is present the middle of the frame so to have as much material to work with and torch the van frame about a foot or so just behind the front door's then start triming the donar front 4x4 section till your wheel base is where you need to be then weld it and plate the inside and weld it and bolt it .it sound's hard it's not just alittle time for something you truely want. any question's let me know.