I should have two E body, one A body and at least one 69 B body. I just dont remember which is which. So the dual pattern tail shaft is B/E? I think they all have dual shift mounts except for the first one.
OH crap I 'm sorry, just realized you are LOOKING for an E body box.
70/ later B/E body boxes are long shaft and have two shifter mounts, because the shifter mounts on the rear of an E body, and at the front for a B body