Dan is a great guy to deal with, he will build exactly what you want. A couple of tips, have the correct seat installed and don't forget you helmet so you can select the Hight, position and the rake of the top bars. Also make Dan's life easier and save you a little money strip everything out of the car that will get in Dan's way. Passenger seat, trim, any gas tank covers, you say your swapping to aeroscreen, but I would have the cage built with the windscreen in place in case you change your mind.
I also know a great (the best I have ever used) in the area, Wally's Iron Works in Mt Airy.
Graham