Well...
I am building a speedster myself and have to make a decision along the same lines. I see that you did not use the kit, as it does not come with a windshield. Though I have a cowl and windshield from a 30-31, I think the windshield that comes with kit looks better, but it is expensive! With the kit you get a choice of windshield heights, from 9 to 15 inches.
Giorgio