the frame measurements in in the post made by user "Loose Chain" seemed to be buried and lost in this thread. i was surprised when going through old posts and the measurements were right there but hadn't been commented on.
You have to realize, back then I often read and posted late at night, and was not always sober. I've got a chart for the '85, and I'm sure the specs are out there on the '86-89, and maybe even the "tweaked" specs for the '89. However, the effort required to find them, and the clarity they'd offer, would probaby inhibit our ability to BS on BF.