Thanks very much for all the comments guys, I'm having a good time with this.
By the way, I intend to build a hot rod based off Garys art, not a replica. I do not intend to do the dual cowls. I'm going to do one. The car is far to narrow to have any hope of finding two windscreens that will fit. My cab is 35mm at the a-pillars and tapers to 39mm. If you guys have anything that might work, I'd be happy to have a look.