Richard, when I'm situations like that, I remind myself that I somehow got it out without too much trouble, so it has to go back in. Keep the faith, it will go in, it's just a matter of finding the right position.
As a last ditch approach, I think the binnacle is removable, at least in the 280s. There are some sheet metal screws that are visible inside the dash if the tach and speedo are out. I haven't removed it and don't know what difficulties it may entail, but I have seen the screws.
George Davis
'69 280 SL Euro manual