Yep, all Ford vans in those years came with an open rear dif for better mileage and because it’s cheaper. Just like most older 2WD pickup trucks it’s really only one wheel drive, you can sit and spin one wheel on flat ground much less a grade. First step is to put some kind of a locker in the rear (Detroit etc.) to get you by if you are slowly building a project 4X4 van over time. :smiley_drive: