Floor of vehicle is metal, spare is a shelf with access from rear door. Door has a partial indentation on the inside for tire clearance. Personally I think the blackwalls look correct for the style of vehicle you are creating. As a delivery these were bare bones, not much flash. hope that helps and keep up the great work!
Hi brewster,I own a 1:1 48 Chevy Sedan delivery, and the platform was originally a wood floor, raised with a spare tire storage at the back door. Since these were delivery vehicles, they came from the factory with the styleline interior, Bucket seats that hinged forward, rubber floor mats, vinyl or leatherette seats, 1/2 headliner if ordered by plumber or light delivery company, usually radio delete, no clock, heater was optional as well. The rear bumper usually has an indentation in it, different than the sedan it is built on. Gas tank is on the pass, side with screwcap. Hope this clears up a few things for you. Great build you have going there!