after looking around some more at the can am cars, they are all rear engine and have a very low sloped hood. That works for a car with a tiny windshield with no need for a top. But for a car with a windshield the width of the car it would not really gain anything it looks like. If I could find a windshield like in my kit car then I would maybe think about it a bit more.
A setup like that would be totally pointless to start with a convertible. Just start with a pile of steel and a bender and build a car like I did when I rebuilt that car.
I am thinking that maybe a little less radical of a build would be a lot faster to actually get running and maybe still be slightly reliable and practical to commute in.