starter bellhousing shield

The car is a '70 Plymouth Duster with 225 slant six and 904 auto tranny. I can see the flywheel. Should there be a small shield that bolts-in in tandem with the starter OR is this a larger top shield that was left out on a prior service of the vehicle??? anyway I need one of these shields if you have it ...Thanks, Nick s. Cincinnati, Ohio 45219