1911 firewall

Can someone tell me the dimensions of the top part (windshield riser) of a 1911 firewall. My 1911 project only came with the bottom part of the firewall. Thanks, Art

Depends on the brand and size of windshield. What windshield are you planning to use? What are the dimensions?

The windshield is a Rand and is 41 1/4 inches long. Thanks, Art