Depth of cut air gap plenum divider

Hello, I bought a used edelcork air gap intake and the plenum divider has been milled down 1/2”. Does anyone know what depth the small block Chevy air gap plenum divoders are cut down in stock form? Just wondering if I need to go deeper or leave it be. Should I also blend the corners/sharp edges of the cut down or leave as is? Thanks.

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