Pulling hard to one side on a hard stop is very rarely caused by brake issues. Exceptions would be one side having the primary and secondary shoes backwards, one side wet with brake fluid or grease, or one drum glazed.
More than likely you have a worn tie rod end, drag link ends, one loose kingpin, or loose leaf spring bushings. (You ruled out wheel bearings.)
Carl
The fly in the ointment is unequal drum temperatures. Don't know how any suspension or alignment issue could cause that, unless it was extreme wear or weight distribution, and she hasn't hauled a load in almost 20 years.
I appreciate the insight. Wish it were something as simple as shoes on backwards or glazed or wet! Perhaps(?) some small merit to loose leaf spring bushings. I rebuilt tie rod ends, kingpins and all that steering stuff maybe 40K ago but have kept them lubed religiously since.
