I am pretty sure that the pre-2007 3500SRW 16x7 wheels & 265 tires will work OK on a 3500 van,
but does anybody have any experience with 2008-2010 2500HD/3500HD 17x7.5 wheels with 265 tires like these
http://www.dieselplace.com/forum/attachment.php?attachmentid=123226&d=1320001450
on a 3500 van?

Bolt pattern on all of the 2500/3500 wheels is the same 8 on 6.5" (165mm) bolt circle (up to the 2011, which are 180mm), so they will bolt on, but what I am wondering about is tire clearance.

I have a set of those on my 1994 2500 pickup. The front wheels rub the frame if you turn too sharply. I have a set of spacers that I need to put on. I like the look, ride, etc. The factory bridgestones are really great wearing tires. I got them at half life, and have put about 30000 on them, and they aren't in too bad shape still. Sorry for the long reply, they'll bolt up.

I just put 265's on my 06 van. They fit without any modifications, as for the 17" I do not know, but I bet it would look nice!!

post pics if you get them

x2 on the 07 classic 3500 wheels fitting, they do. no help on the 07+NBS sorry

x2 on the 07 classic 3500 wheels fitting, they do. no help on the 07+NBS sorry
I just noticed this post in an old (but related) thread:
http://www.dieselplace.com/forum/showpost.php?p=3454360&postcount=5
X2!I took the wheels of my lbz truck and couldnt even get them on the front of the van. they wouldnt even bolt all the way down on the lug nuts.
Were these lbz truck wheels (that wouldn't fit your van) not the oem wheels?

Then I saw this post, which indicates that the oem 2008-2010 17x7.5" wheels will fit OK:
http://www.dieselplace.com/forum/showpost.php?p=3455123&postcount=11

I have aftermarket 16x8 wheels on the truck with +14 (i think) backspacing. I couldnt get those wheels on the van.

The stock LBZ 3500 srw wheels fit on the 06 van I had. And I sold them to a friend who now has them on his 2000 Express van