Is what I figured. Oh well, I guess I'll find a new home for it. I'm going to look at an 89 burb tomorrow night to purchase as a whole. Guess I'll see what it has in it. My truck does have the 700r transmission, or so I think, but as soon as it goes poof it'll get changed to a more solid earlier piece of hardware.
I'm just doing odds and ends to try and modernize the interior a little here and there. I'm close to piecing together enough stuff to tear in to the dash again. Sad thing is we removed a junk radio and the po had hacked the dash. We got a piece from the junkyard and welded it in and I tossed in a factory radio (I like the looks of factory stuff). But now I realize I'm spoiled to a little bit more modern electronics, but am way to tight to buy a $250 aftermarket that fits the factory hole.
I was going to just take the screws off the face plate and look at that speedo closer, but now I will just leave it as a whole and go on with other stuff. I was excited too because the housing appears perfect! All the ones I've grabbed at the junkyard seem to have ears broken and/or the tab broken where the shift indicator feeds through. At least I can still use the bezel.