328 Engine Grill Attachment Rivets

Has anyone ever removed the grill above the engine compartment and re-installed? The rivets that attach the grill to the deck lid are between the louvers and appear to require a very very small rivet gun. I want to re-paint the louvers and need to remove them to do this correctly but looking to see if anyone know what gun the factory might have used to set these rivets with so little room for the head on the gun. A normal size rivet gun head will not fit between the louvers.