Dynamaps site buildings as


Hi,
I have created site buildings using dynamaps. i noticed that each building is created as Generic model. Is it possible to change height individual building unit ? I also want to turn few buildings into gable roof.
I used to create site buildings with Site family each unit at a time. It doesn’t make sense creating 60 pieces. Is there a way to turn Generic into Site family ?

ps. I tried to run the nodes with Categories as set to Site and Casework, still the new object is uneditable