Pusher Fan Clearance

Is anybody running a pusher fan on their 1967-1969 Dart? I am trying to figure out how much room there is between the grille and the front of the radiator. I would like to run a SPAL 16" Pusher. They have three different thickness, their thickest one pushes the most air. Can someone measure that space on their Dart for me? My grill is out getting rebuilt.

Thanks.