No issues with highjacking here! As long as it has to do with a 4x4 van I'm good!
Hardest part replacing the body mounts is the almost always rusted bolts. If the van has an interior it will need to be removed to gain access to the body bolts. If they come loose, great. I've had to cut many of them off. Once the bolts are out, you don't need to lift the body from the frame much to change the mounts. So, I would bother disconnecting everything. The proper body mounts and hardware is only available from Ford so expect to pay north of 600 for an EB van.