Mopar 273 rocker shaft hood downs

Yes they are the same.

On Crane adjustables they don't have spacers they have springs so there is constant pressure against the hold downs. You can shim yours to tighten them up if needed. I would shim them in a way to keep the pushrods centered on the valve. You can see in this picture of the big block the first rocker needs to be moved over to be centered.

DSCN1798.JPG

100_0096 (2).JPG