Any idea if those 225 75 16 tires will fit on a stock Syncro?
nope, they barely fit with a lift- you need spacers in the rear to avoid the trailing arms (or modified trailing arms, or 16" trailing arms), and all fenders need to be cut. Then you need the Burley front uppers so that you can get it aligned properly. That size tire on a 16" rim would render a stock engine pretty useless unless you want to shift into 1st on hills. If I didn't need that size tire for a beach pass, I'd be doing 215/70's- much better size.
half-E- once the Adventurewagen top is on i can stand, but it's hard to explain the setup- it'll work just fine, I won't be standing when working inside the van.