Dave---This narrow minivan seat thing has come up numerous times on the rodders forum, but I never yet have seen confirmation of this being used in a model A . I just went out to the garage and measured, and in my particular case a seat could not be greater than 43" long on the rear side, and 40 1/2 on the front side, if the seat was 16" front to back. Most modern seats that I have seen are wider at the front than at the rear, which is the opposite configuration to what I require. When you look at the attached photo, you will see the large gussets which I welded into the door openings to prevent the dreaded "pinch arm body flex" They really dont block the door upening anymore than the end of a seat will, once a seat is installed.