7 inch window

I'm building a 32 three window coupe in <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com</st1:State>Virginia and must have one windshield wiper. The arm needs to be five inches and the wiper needs to be 7 inches. What have any of you used or modified in this same situation?

 

We have provision in the 32 3W Kilbourne-bodied gl*** car for an electric wiper. The hole is in the header and is usually plugged with a rubber plug.
We used the simple little single speed motor available from most early Ford parts vendors. It does require modifying the header panel since only the "Mighty Wiper" is small as the vacuum wiper originally used, but the Mighty Wiper is fairly expensive.
We use the original wire-style arm and hook mounted blade as well.