Thanks everyone for the support. Really great community here, I do not have nearly enough time in my days to be part of it.
I have around 200km (120mi) of highway driving on this van now and I must say I'm super impressed. At speeds of 100-110 KPH it's a one hand on the steering wheel type drive. I've owned a few lifted vehicles and this one is among the best driving and biggest. Tomorrow it leaves on it's first road trip. The owner is doing a 2400km road trip to Vancouver so it should be interesting to get his feed back as he has limited seat time. Wished we had more time with it prior to setting out on such an epic journey but oh well.
A few here have commented on the fuel tank. I was really trying to make the shape identical to the contours of the stock tank. It looks cool and was a fun challenge but probably isn't necessary and if I were to build more would simplify the design significantly while trying to attain the same volume.
I'm still searching for a van for myself but it is proving to be a real challenge. Balancing the features that I want with overall used condition, I haven't yet found a van in which those two cross. A clean 2005 extended body with a 5.4 engine has just come up for sale about an hours drive from me. I don't really want to longer body and do question how well a 5.4 would handle my plans for a van........but it's clean. lol. I also have a 12v cummins sitting on a stand from a project that never materialized. I'm tempted to buy a van 100% based on overall condition and then try my hand at a cummins conversion. This would open up the possibilities significantly.
Steelheadjones - Sounds like you have bad luck with animals. lol. Hopefully this bumper is never tested against any of the creatures you mentioned. To answer your question. The Superlift radius arms move the frame pivot point up significantly from stock, the range is about 3-3/8" to 7.875". This van is set @ 5" so if you rolled the axle to the absolute minimum of the adjustment range you could presumably come down 1-5/8" from it's current height. Only downfall would be you'd no longer have any adjustment range to set your axle caster. I'm working on building my own radius arms to be a happy medium between the superlift arms and factory, (although since I don't own a van I'm not sure why I'm doing it). To give you an idea of the lift, the measurement from axle centerline to edge of fender is 30.5". Hope that helps.
Here is a few more photos of progress and the last one is for you neatvan to show the fuel tank.