The reinforcing plates that would go under the hull seem to be steel. The outboard brackets are set to sit pretty flat but being brass the bases could easily be angled to match an early Ford or other cowl with a hacksaw and a little brazing rod in the right hands. Please have a look at the pictures and confirm these will work for you, and please ask questions as needed.
The item "Vintage Wooden Runabout Boat or Roadster Chromed Brass Windshield Bracket Set" is in sale since Tuesday, September 26, 2017. This item is in the category "eBay Motors\Parts & Accessories\Boat Parts\Body Parts".
The seller is "spellbound59" and is located in Boise, Idaho. This item can be shipped worldwide.