This type spacer goes above your adapter plate:
https://www.summitracing.com/parts/edl-8723/overview/
There are several variations on the theme.
If you haven't done it already, check the float levels in your carb. As shipped from the factory, they are often wrong and can lead to flooding or a lean condition. Order a top carb gasket when you order a spacer in case you damage the one on the carb when you open it up.
Before ordering, might research some of the tuning threads and if needed, pickup some jets and rods that more closely match your desired application. Rod and springs can be changed without lifting the top. Changing the jets requires lifting the top.