Tim, I saw your business van in Battle Ground years ago, but was on my way elsewhere and couldn't stop to say hi or leave a note.

Sure enough, the alternator output voltage profile on my '88 2WD cargo was about 1 VDC lower than that of the '86 cargo. The '86 is in my new workshop in WA now; my '88 and I are in Eugene, OR. I'll be up there at my property to do some regular maintenance and troubleshooting on both vans around Thursday, 5/5.