I'm using a race weight hood on my '66 Dart and nailing down the front 8" has been problematic. Above about 134 it would start to flutter with 4 pins across the radiator support and interim measures involving HD zip ties eventually failed leading to the installation of a new hood. This time I've moved the center two pins forward 5" and, yep those reinforcing plates are stainless and doubled up on the underside with stainless 3/16" button head cap screws & nylocks securing them:
This weekend I'm installing the trim strip on the front edge of the hood and adding some bracing from the 3/16" screws to the leading edge of the hood, this is facilitated by the retainer clips I fabricated last time I did this...
If you're still not sure, put a large sheet metal plate (about the size of a CD) centered on the pin on the underside of hood. Use the bolt holes for the exterior pin plates to use the inner plate to sandwich the hood.