In some of the older fix'em books they explain the process. The first thing they tell us is, unless something has happened to the car body or frame, put them back exactly where they came off. But, like Roy, we often fail to make correct notes or photos to record that,
The purpose of the rubber ones is to allow some small degree of adjustment for door gap angles. It is possible to move the hard and soft locations to accomplish that process but it will be very small movements that are magnified by the difference between the bolt points and how tight the rubbers get tightened
If you happen to check the right parts books they will list them as rubber or solid/aluminum by location and part number, but not all do.
Body to Frame Spacers
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