The 65 vs stock 55 series tires made it feel a lot less responsive cornering (loved the stock handling of this thing), quieter on insanely rough/loud Seattle freeways, much smoother over broken concrete (aka our streets), and way, way better on logging roads. Basically what you'd expect on a taller sidewall tire. I drove these for a few weeks before installing front spacers.
I could tell no difference in handling once the 30mm spacers went in, though I'm sure you'd notice something if on stock tires. Quieter again, if anything, which could be the rubber spacer isolating the struts from the metal body of the van. I get that there will be increased wear on CV's, etc., but 30mm is pretty modest and the angles looked reasonable after install. The amount I pay in CV and front end work will be saved by not peeling open the underside like a popcan on those ridges of cobble that like to stick up from the center of logging roads.
@jrm223 Good info on the wiper arms! I put them back on with anti-seize, which should also make it easier. I'm looking to keep this fairly low cost, so no welding or bags. I'll probably do the rear spacers, if the shop wants $$ I'm sure I can find better spring compressor to rent somewhere.