Thank you for your interest in my products. To power these cars, I would recommend either a NWSL Stanton drive or a Hollywood Foundry power truck of your choosing. The frame can be built using 2mm thick styrene (There are support tabs in the shell interior to hold the frame in place). As far as I know, most of the wood cars used trucks with a 6'6" wheelbase with a 33" wheel diameter.
So far, i have not yet built anything for the Chicago West Towns Rwy. but I do have a CA&E 450 series car nearly completed. More Chicago-area cars are planned.