1949-1951 Pontiac exterior sunvisor mounting

i purchased a GM exterior sunvisor for my 49 split windshield Pontiac. Does any one know the mounting screw size for the ends and the nut and bolt size for the center mounting? Appreciate the info

 

Ah never mind if you like those damned things you would never understand.

 

????
Pic would help!
On my '49 Chevy the fasteners could be anything I wanted. The center brace clamps to windshield trim, and the ends through-bolted to the drip rail. #6 Stainless screws.

 

Grabber screws for sheetrock ...