Have you thought of option B or C ?
B ) take the hitch on the van from under the vans front A frame to above the A frame as in the pic the base plate of the hitch is bolted under the A frame on the van. This will give you better ramp over.
C) raise the suspension or bigger tyres on the van so it is in line with your truck, then you only need a normal straight out attachment point. This will give both better ramp over and make it match your truck so your not dragging it in certain situations where your vehicle has better clearance than the van, though it will effect side slope /tipping point.

