Welcome coeleo. To ensure proper identification of parts we need to clarify the model of your truck. I am assuming you are talking about your 1949 truck, since you asked about a wiring harness for a '49 truck in a separate question. In this era, all COEs were in the 5000 series of models and the 6400 series had the standard cab. This will make a difference in the wiring harness required, so can you clarify?
Kent