This is awesome information. Thanks for taking the time to put it together. I added this to our Suspension- Quick-FAQ links.
LINK
Unless I missed it, one thing I see that you might add is the year range on 73-87 donors. For those that are not aware the Suburbans from '73 thru '91 use the same suspension.
In most cases the Burbs will come with a front sway bar as well.