Correction, Just was reading some of my Iron Mountain Research Materials. Ford did ship Iron Mountain wooden wagon parts to Briggs, Murray, and Baker-Raulang. These parts were rough cut, trimmed to finish size berfore shipping to the body builders. At that time the body builders provided the assembly and metal stamping work on all wooden wagon bodies. The graders at the Iron Mountain Ford mills were fastidious about what they selected for shaping, trimming and shipping. Henry Ford discovered the Mengel Body Co. in Louisville, KY and this co. could make the wooden parts cheaper than Birggs or Murray, he contracted and the 1932 wagon bodies (wooden parts) were made i Louisville. Briggs and Murray continued the metal stamping AND the assembly work. With that work finished, the bodies were shipped to the various assembly plants. This work with Memgel concluded with 1932 and the woodwork was returned to Iron Mountain. The wooden body construction there continued until 1951. In 1937, Ford started shipping chassis to IM to build complete wagons Ford instance, Ford in 1940 shipped IM 25 boxcars a day containing the steel parts including floor pans, inner rear wheel well panels, fenders, and all other needed steel parts. I could on on in great detail, BUT I believe my point has been made. Sincerely Jimalabam..