The best way to check, would be to drop one or both rear coils to see if it fits the top of the coil spring AND that it fits into the upper coil cup (after removing the stock coil bushing).
Or, if that's not a possibility...
There should be a recess in the spacer that the top of the spring fits into, if you post a center of recess to center of recess measurement to determine the diameter of the coil that will fit the spacer.
Maybe someone will post the diameter of some stock coils they have laying around...I can't find mine...
This pic may be helpful to know how it should look...
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