How can I hold the windshield open, roadster PU

[bschulze]

Please help.

When I'm driving my 1928 roadster pick up, the windshield blows closed. The only ventilation is through the side openings.

I can't tighten the top wing nuts enough to hold the wind shield open. Should I try to add swing arms to hold the windshield open?

It does not appear slotted wing arms were originally there on a 1928 roadster pick up .

Thank you.
Bob