Flush mounting Model A doors is not for the faint hearted. It is a lot of work to do it right. I flush mounted the doors on my 31 coupe and it was not easy. I had to build completely new B pillars and and fab an offset on the quarters but I finally got it done. On last weeks American Hotrod show they did the flush mount doors on a Brookville roadster pickup but as usual, they didn't teach us anything on the "Learning Channel".