So the spacers are ok, I spent most of Sunday off roading it on trails, but the shocks are so long that the springs pop out occasionally. A real nuisance. Still, it's a proof of concept, and I know now that I am on the right track lifting the van a bit, but not a lot. It's not so tall that it's obnoxious or hard to use normally, and tall enough to give me enough clearance for our intended uses.
So, I had to stop and jack it up and put the springs back in three times.
Still haven't gotten to the camber correction. I need to though, it's going to start wearing the tires.
Short term, I will probably use some limiting straps, since there is no drive axle in front, I don't think I will miss the articulation. I could use a bit more in the back though, I didn't put longer shocks on out back yet. Only lost traction once, had to back up and move over a bit. I am using Terra Grappler tires, and they worked good in sand, rocks and silt yesterday.
Overall, I am satisfied with this direction so far.