I own a 1986 Syncro and have excessive wear on the outside of the front passenger tire. I know the wheel bearing is good. There is also a tremendous amount of vibration and noise inside the van. Any ideas?
Yes. This kind of wear is an alignment issue (in your case the toe-in/toe-out is bad, or possibly the caster/camber).
There are many things other than wheel bearings that could cause this. For starters: tie rod ends, steering arms/knuckles, ball joints.
I'd suggest taking it for an alignment. It may be that you simply bumped a curb too hard one day. If not, the guys at the alignment shop will be able to quickly diagnose what is wrong.