When I
pulled my 6.9 from my other E350, I undid the body mounts on the front of the cab to give myself an inch or two extra, so that it would be possible to pull the block with the IP and injector lines still installed.
Turns out lifting the body to pull the engine or other tasks is more trouble than it's worth on a van. Just the two body mounting bolts I took out on the front were so rusted that it was exceedingly difficult to turn them even with copious amounts of penetrating oil. And if I were to try to lift the whole cab, I would just have to remove the chairs and carpet in the van first, disconnect dozens of electrical connectors, and remove tranny/steering/brake linkage... If i'm going to go thru all that, I might as well just forget all that and just pull off the IP and injector lines. For the
next two times I pulled my engine block, I didn't lift the body ever again.
Same goes for the heads. It's much less work to just remove the opposite motor mount, rest the block on its side on the crossmember, pull the head, clean up the surface, install the new HG, and put on the new head.